What does the word pressure means

This article is about pressure in the physical sciences. For other uses, see Pressure (disambiguation).

Pressure
Common symbols	p, P
SI unit	pascal [Pa]
In SI base units	1 N/m2, 1 kg/(m·s2), or 1 J/m3
Derivations from other quantities	p = F / A
Dimension	M L−1 T−2

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.^[1]: 445 Gauge pressure (also spelled gage pressure)^[a] is the pressure relative to the ambient pressure.

Various units are used to express pressure. Some of these derive from a unit of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per square metre (N/m²); similarly, the pound-force per square inch (psi, symbol lbf/in²) is the traditional unit of pressure in the imperial and US customary systems. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure, and the torr is defined as 1⁄760 of this. Manometric units such as the centimetre of water, millimetre of mercury, and inch of mercury are used to express pressures in terms of the height of column of a particular fluid in a manometer.

Definition[edit]

Pressure is the amount of force applied perpendicular to the surface of an object per unit area. The symbol for it is «p» or P.^[2]
The IUPAC recommendation for pressure is a lower-case p.^[3]
However, upper-case P is widely used. The usage of P vs p depends upon the field in which one is working, on the nearby presence of other symbols for quantities such as power and momentum, and on writing style.

Formula[edit]

Mathematically:

^[4]

where:

is the pressure,

is the magnitude of the normal force,

is the area of the surface on contact.

Pressure is a scalar quantity. It relates the vector area element (a vector normal to the surface) with the normal force acting on it. The pressure is the scalar proportionality constant that relates the two normal vectors:

The minus sign comes from the convention that the force is considered towards the surface element, while the normal vector points outward. The equation has meaning in that, for any surface S in contact with the fluid, the total force exerted by the fluid on that surface is the surface integral over S of the right-hand side of the above equation.

It is incorrect (although rather usual) to say «the pressure is directed in such or such direction». The pressure, as a scalar, has no direction. The force given by the previous relationship to the quantity has a direction, but the pressure does not. If we change the orientation of the surface element, the direction of the normal force changes accordingly, but the pressure remains the same.^{[citation needed]}

Pressure is distributed to solid boundaries or across arbitrary sections of fluid normal to these boundaries or sections at every point. It is a fundamental parameter in thermodynamics, and it is conjugate to volume.^[5]

Units[edit]

The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N/m², or kg·m⁻¹·s⁻²). This name for the unit was added in 1971;^[6] before that, pressure in SI was expressed simply in newtons per square metre.

Other units of pressure, such as pounds per square inch (lbf/in²) and bar, are also in common use. The CGS unit of pressure is the barye (Ba), equal to 1 dyn·cm⁻², or 0.1 Pa. Pressure is sometimes expressed in grams-force or kilograms-force per square centimetre (g/cm² or kg/cm²) and the like without properly identifying the force units. But using the names kilogram, gram, kilogram-force, or gram-force (or their symbols) as units of force is expressly forbidden in SI. The technical atmosphere (symbol: at) is 1 kgf/cm² (98.0665 kPa, or 14.223 psi).

Pressure is related to energy density and may be expressed in units such as joules per cubic metre (J/m³, which is equal to Pa).
Mathematically:

Some meteorologists prefer the hectopascal (hPa) for atmospheric air pressure, which is equivalent to the older unit millibar (mbar). Similar pressures are given in kilopascals (kPa) in most other fields, except aviation where the hecto- prefix is commonly used. The inch of mercury is still used in the United States. Oceanographers usually measure underwater pressure in decibars (dbar) because pressure in the ocean increases by approximately one decibar per metre depth.

The standard atmosphere (atm) is an established constant. It is approximately equal to typical air pressure at Earth mean sea level and is defined as 101325 Pa.

Because pressure is commonly measured by its ability to displace a column of liquid in a manometer, pressures are often expressed as a depth of a particular fluid (e.g., centimetres of water, millimetres of mercury or inches of mercury). The most common choices are mercury (Hg) and water; water is nontoxic and readily available, while mercury’s high density allows a shorter column (and so a smaller manometer) to be used to measure a given pressure. The pressure exerted by a column of liquid of height h and density ρ is given by the hydrostatic pressure equation p = ρgh, where g is the gravitational acceleration. Fluid density and local gravity can vary from one reading to another depending on local factors, so the height of a fluid column does not define pressure precisely.

When millimetres of mercury (or inches of mercury) are quoted today, these units are not based on a physical column of mercury; rather, they have been given precise definitions that can be expressed in terms of SI units.^[7] One millimetre of mercury is approximately equal to one torr. The water-based units still depend on the density of water, a measured, rather than defined, quantity. These manometric units are still encountered in many fields. Blood pressure is measured in millimetres (or centimetres) of mercury in most of the world, and lung pressures in centimetres of water are still common.^{[citation needed]}

Underwater divers use the metre sea water (msw or MSW) and foot sea water (fsw or FSW) units of pressure, and these are the standard units for pressure gauges used to measure pressure exposure in diving chambers and personal decompression computers. A msw is defined as 0.1 bar (= 100000 Pa = 10000 Pa), is not the same as a linear metre of depth. 33.066 fsw = 1 atm^{[citation needed]} (1 atm = 101325 Pa / 33.066 = 3064.326 Pa). The pressure conversion from msw to fsw is different from the length conversion: 10 msw = 32.6336 fsw, while 10 m = 32.8083 ft.^{[citation needed]}

Gauge pressure is often given in units with «g» appended, e.g. «kPag», «barg» or «psig», and units for measurements of absolute pressure are sometimes given a suffix of «a», to avoid confusion, for example «kPaa», «psia». However, the US National Institute of Standards and Technology recommends that, to avoid confusion, any modifiers be instead applied to the quantity being measured rather than the unit of measure.^[8] For example, «p_g = 100 psi» rather than «p = 100 psig».

Differential pressure is expressed in units with «d» appended; this type of measurement is useful when considering sealing performance or whether a valve will open or close.

Presently or formerly popular pressure units include the following:

• atmosphere (atm)
• manometric units:
  • centimetre, inch, millimetre (torr) and micrometre (mTorr, micron) of mercury,
  • height of equivalent column of water, including millimetre (mm H
    ₂O), centimetre (cm H
    ₂O), metre, inch, and foot of water;
• imperial and customary units:
  • kip, short ton-force, long ton-force, pound-force, ounce-force, and poundal per square inch,
  • short ton-force and long ton-force per square inch,
  • fsw (feet sea water) used in underwater diving, particularly in connection with diving pressure exposure and decompression;
• non-SI metric units:
  • bar, decibar, millibar,
    • msw (metres sea water), used in underwater diving, particularly in connection with diving pressure exposure and decompression,
  • kilogram-force, or kilopond, per square centimetre (technical atmosphere),
  • gram-force and tonne-force (metric ton-force) per square centimetre,
  • barye (dyne per square centimetre),
  • kilogram-force and tonne-force per square metre,
  • sthene per square metre (pieze).

Examples[edit]

As an example of varying pressures, a finger can be pressed against a wall without making any lasting impression; however, the same finger pushing a thumbtack can easily damage the wall. Although the force applied to the surface is the same, the thumbtack applies more pressure because the point concentrates that force into a smaller area. Pressure is transmitted to solid boundaries or across arbitrary sections of fluid normal to these boundaries or sections at every point. Unlike stress, pressure is defined as a scalar quantity. The negative gradient of pressure is called the force density.^[9]

Another example is a knife. If we try to cut with the flat edge, force is distributed over a larger surface area resulting in less pressure, and it will not cut. Whereas using the sharp edge, which has less surface area, results in greater pressure, and so the knife cuts smoothly. This is one example of a practical application of pressure^[10]

For gases, pressure is sometimes measured not as an absolute pressure, but relative to atmospheric pressure; such measurements are called gauge pressure. An example of this is the air pressure in an automobile tire, which might be said to be «220 kPa (32 psi)», but is actually 220 kPa (32 psi) above atmospheric pressure. Since atmospheric pressure at sea level is about 100 kPa (14.7 psi), the absolute pressure in the tire is therefore about 320 kPa (46 psi). In technical work, this is written «a gauge pressure of 220 kPa (32 psi)».

Where space is limited, such as on pressure gauges, name plates, graph labels, and table headings, the use of a modifier in parentheses, such as «kPa (gauge)» or «kPa (absolute)», is permitted. In non-SI technical work, a gauge pressure of 32 psi (220 kPa) is sometimes written as «32 psig», and an absolute pressure as «32 psia», though the other methods explained above that avoid attaching characters to the unit of pressure are preferred.^[8]

Gauge pressure is the relevant measure of pressure wherever one is interested in the stress on storage vessels and the plumbing components of fluidics systems. However, whenever equation-of-state properties, such as densities or changes in densities, must be calculated, pressures must be expressed in terms of their absolute values. For instance, if the atmospheric pressure is 100 kPa (15 psi), a gas (such as helium) at 200 kPa (29 psi) (gauge) (300 kPa or 44 psi [absolute]) is 50% denser than the same gas at 100 kPa (15 psi) (gauge) (200 kPa or 29 psi [absolute]). Focusing on gauge values, one might erroneously conclude the first sample had twice the density of the second one.^{[citation needed]}

Scalar nature[edit]

In a static gas, the gas as a whole does not appear to move. The individual molecules of the gas, however, are in constant random motion. Because we are dealing with an extremely large number of molecules and because the motion of the individual molecules is random in every direction, we do not detect any motion. When the gas is at least partially confined (that is, not free to expand rapidly), the gas will exhibit a static pressure. This confinement can be achieved with either a physical container of some sort, or in a gravitational well such as a planet, otherwise known as atmospheric pressure.

In a physical container, the pressure of the gas originates from the molecules colliding with the walls of the container. We can put the walls of our container anywhere inside the gas, and the force per unit area (the pressure) is the same. We can shrink the size of our «container» down to a very small point (becoming less true as we approach the atomic scale), and the pressure will still have a single value at that point. Therefore, pressure is a scalar quantity, not a vector quantity. It has magnitude but no direction sense associated with it. Pressure force acts in all directions at a point inside a gas. At the surface of a gas, the pressure force acts perpendicular (at right angle) to the surface.^{[citation needed]}

A closely related quantity is the stress tensor σ, which relates the vector force to the
vector area via the linear relation .

This tensor may be expressed as the sum of the viscous stress tensor minus the hydrostatic pressure. The negative of the stress tensor is sometimes called the pressure tensor, but in the following, the term «pressure» will refer only to the scalar pressure.^{[citation needed]}

According to the theory of general relativity, pressure increases the strength of a gravitational field (see stress–energy tensor) and so adds to the mass-energy cause of gravity. This effect is unnoticeable at everyday pressures but is significant in neutron stars, although it has not been experimentally tested.^[11]

Types[edit]

Fluid pressure[edit]

Fluid pressure is most often the compressive stress at some point within a fluid. (The term fluid refers to both liquids and gases – for more information specifically about liquid pressure, see section below.)

Fluid pressure occurs in one of two situations:

1. An open condition, called «open channel flow», e.g. the ocean, a swimming pool, or the atmosphere.
2. A closed condition, called «closed conduit», e.g. a water line or gas line.

Pressure in open conditions usually can be approximated as the pressure in «static» or non-moving conditions (even in the ocean where there are waves and currents), because the motions create only negligible changes in the pressure. Such conditions conform with principles of fluid statics. The pressure at any given point of a non-moving (static) fluid is called the hydrostatic pressure.

Closed bodies of fluid are either «static», when the fluid is not moving, or «dynamic», when the fluid can move as in either a pipe or by compressing an air gap in a closed container. The pressure in closed conditions conforms with the principles of fluid dynamics.

The concepts of fluid pressure are predominantly attributed to the discoveries of Blaise Pascal and Daniel Bernoulli. Bernoulli’s equation can be used in almost any situation to determine the pressure at any point in a fluid. The equation makes some assumptions about the fluid, such as the fluid being ideal^[12] and incompressible.^[12] An ideal fluid is a fluid in which there is no friction, it is inviscid^[12] (zero viscosity).^[12] The equation for all points of a system filled with a constant-density fluid is^[13]

where:

p, pressure of the fluid,

= ρg, density × acceleration of gravity is the (volume-) specific weight of the fluid,^[12]

v, velocity of the fluid,

g, acceleration of gravity,

z, elevation,

, pressure head,

, velocity head.

Applications[edit]

• Hydraulic brakes
• Artesian well
• Blood pressure
• Hydraulic head
• Plant cell turgidity
• Pythagorean cup
• Pressure washing

Explosion or deflagration pressures[edit]

Explosion or deflagration pressures are the result of the ignition of explosive gases, mists, dust/air suspensions, in unconfined and confined spaces.

Negative pressures[edit]

While pressures are, in general, positive, there are several situations in which negative pressures may be encountered:

• When dealing in relative (gauge) pressures. For instance, an absolute pressure of 80 kPa may be described as a gauge pressure of −21 kPa (i.e., 21 kPa below an atmospheric pressure of 101 kPa). For example, abdominal decompression is an obstetric procedure during which negative gauge pressure is applied intermittently to a pregnant woman’s abdomen.
• Negative absolute pressures are possible. They are effectively tension, and both bulk solids and bulk liquids can be put under negative absolute pressure by pulling on them.^[14] Microscopically, the molecules in solids and liquids have attractive interactions that overpower the thermal kinetic energy, so some tension can be sustained. Thermodynamically, however, a bulk material under negative pressure is in a metastable state, and it is especially fragile in the case of liquids where the negative pressure state is similar to superheating and is easily susceptible to cavitation.^[15] In certain situations, the cavitation can be avoided and negative pressures sustained indefinitely,^[15] for example, liquid mercury has been observed to sustain up to −425 atm in clean glass containers.^[16] Negative liquid pressures are thought to be involved in the ascent of sap in plants taller than 10 m (the atmospheric pressure head of water).^[17]
• The Casimir effect can create a small attractive force due to interactions with vacuum energy; this force is sometimes termed «vacuum pressure» (not to be confused with the negative gauge pressure of a vacuum).
• For non-isotropic stresses in rigid bodies, depending on how the orientation of a surface is chosen, the same distribution of forces may have a component of positive pressure along one surface normal, with a component of negative pressure acting along another surface normal.
  • The stresses in an electromagnetic field are generally non-isotropic, with the pressure normal to one surface element (the normal stress) being negative, and positive for surface elements perpendicular to this.
• In cosmology, dark energy creates a very small yet cosmically significant amount of negative pressure, which accelerates the expansion of the universe.

Stagnation pressure[edit]

Stagnation pressure is the pressure a fluid exerts when it is forced to stop moving. Consequently, although a fluid moving at higher speed will have a lower static pressure, it may have a higher stagnation pressure when forced to a standstill. Static pressure and stagnation pressure are related by:

where

is the stagnation pressure,

is the density,

is the flow velocity,

is the static pressure.

The pressure of a moving fluid can be measured using a Pitot tube, or one of its variations such as a Kiel probe or Cobra probe, connected to a manometer. Depending on where the inlet holes are located on the probe, it can measure static pressures or stagnation pressures.

Surface pressure and surface tension[edit]

There is a two-dimensional analog of pressure – the lateral force per unit length applied on a line perpendicular to the force.

Surface pressure is denoted by π:

and shares many similar properties with three-dimensional pressure. Properties of surface chemicals can be investigated by measuring pressure/area isotherms, as the two-dimensional analog of Boyle’s law, πA = k, at constant temperature.

Surface tension is another example of surface pressure, but with a reversed sign, because «tension» is the opposite to «pressure».

Pressure of an ideal gas[edit]

In an ideal gas, molecules have no volume and do not interact. According to the ideal gas law, pressure varies linearly with temperature and quantity, and inversely with volume:

where:

p is the absolute pressure of the gas,

n is the amount of substance,

T is the absolute temperature,

V is the volume,

R is the ideal gas constant.

Real gases exhibit a more complex dependence on the variables of state.^[18]

Vapour pressure[edit]

Vapour pressure is the pressure of a vapour in thermodynamic equilibrium with its condensed phases in a closed system. All liquids and solids have a tendency to evaporate into a gaseous form, and all gases have a tendency to condense back to their liquid or solid form.

The atmospheric pressure boiling point of a liquid (also known as the normal boiling point) is the temperature at which the vapor pressure equals the ambient atmospheric pressure. With any incremental increase in that temperature, the vapor pressure becomes sufficient to overcome atmospheric pressure and lift the liquid to form vapour bubbles inside the bulk of the substance. Bubble formation deeper in the liquid requires a higher pressure, and therefore higher temperature, because the fluid pressure increases above the atmospheric pressure as the depth increases.

The vapor pressure that a single component in a mixture contributes to the total pressure in the system is called partial vapor pressure.

Liquid pressure[edit]

When a person swims under the water, water pressure is felt acting on the person’s eardrums. The deeper that person swims, the greater the pressure. The pressure felt is due to the weight of the water above the person. As someone swims deeper, there is more water above the person and therefore greater pressure. The pressure a liquid exerts depends on its depth.

Liquid pressure also depends on the density of the liquid. If someone was submerged in a liquid more dense than water, the pressure would be correspondingly greater. Thus, we can say that the depth, density and liquid pressure are directly proportionate. The pressure due to a liquid in liquid columns of constant density or at a depth within a substance is represented by the following formula:

where:

p is liquid pressure,

g is gravity at the surface of overlaying material,

ρ is density of liquid,

h is height of liquid column or depth within a substance.

Another way of saying the same formula is the following:

Derivation of this equation

This is derived from the definitions of pressure and weight density. Consider an area at the bottom of a vessel of liquid. The weight of the column of liquid directly above this area produces pressure. From the definition we can express this weight of liquid as where the volume of the column is simply the area multiplied by the depth. Then we have With the «area» in the numerator and the «area» in the denominator canceling each other out, we are left with Written with symbols, this is our original equation:

The pressure a liquid exerts against the sides and bottom of a container depends on the density and the depth of the liquid. If atmospheric pressure is neglected, liquid pressure against the bottom is twice as great at twice the depth; at three times the depth, the liquid pressure is threefold; etc. Or, if the liquid is two or three times as dense, the liquid pressure is correspondingly two or three times as great for any given depth. Liquids are practically incompressible – that is, their volume can hardly be changed by pressure (water volume decreases by only 50 millionths of its original volume for each atmospheric increase in pressure). Thus, except for small changes produced by temperature, the density of a particular liquid is practically the same at all depths.

Atmospheric pressure pressing on the surface of a liquid must be taken into account when trying to discover the total pressure acting on a liquid. The total pressure of a liquid, then, is ρgh plus the pressure of the atmosphere. When this distinction is important, the term total pressure is used. Otherwise, discussions of liquid pressure refer to pressure without regard to the normally ever-present atmospheric pressure.

The pressure does not depend on the amount of liquid present. Volume is not the important factor – depth is. The average water pressure acting against a dam depends on the average depth of the water and not on the volume of water held back. For example, a wide but shallow lake with a depth of 3 m (10 ft) exerts only half the average pressure that a small 6 m (20 ft) deep pond does. (The total force applied to the longer dam will be greater, due to the greater total surface area for the pressure to act upon. But for a given 5-foot (1.5 m)-wide section of each dam, the 10 ft (3.0 m) deep water will apply one quarter the force of 20 ft (6.1 m) deep water). A person will feel the same pressure whether their head is dunked a metre beneath the surface of the water in a small pool or to the same depth in the middle of a large lake.

If four interconnected vases contain different amounts of water but are all filled to equal depths, then a fish with its head dunked a few centimetres under the surface will be acted on by water pressure that is the same in any of the vases. If the fish swims a few centimetres deeper, the pressure on the fish will increase with depth and be the same no matter which vase the fish is in. If the fish swims to the bottom, the pressure will be greater, but it makes no difference which vase it is in. All vases are filled to equal depths, so the water pressure is the same at the bottom of each vase, regardless of its shape or volume. If water pressure at the bottom of a vase were greater than water pressure at the bottom of a neighboring vase, the greater pressure would force water sideways and then up the narrower vase to a higher level until the pressures at the bottom were equalized. Pressure is depth dependent, not volume dependent, so there is a reason that water seeks its own level.

Restating this as an energy equation, the energy per unit volume in an ideal, incompressible liquid is constant throughout its vessel. At the surface, gravitational potential energy is large but liquid pressure energy is low. At the bottom of the vessel, all the gravitational potential energy is converted to pressure energy. The sum of pressure energy and gravitational potential energy per unit volume is constant throughout the volume of the fluid and the two energy components change linearly with the depth.^[19] Mathematically, it is described by Bernoulli’s equation, where velocity head is zero and comparisons per unit volume in the vessel are

Terms have the same meaning as in section Fluid pressure.

Direction of liquid pressure[edit]

An experimentally determined fact about liquid pressure is that it is exerted equally in all directions.^[20] If someone is submerged in water, no matter which way that person tilts their head, the person will feel the same amount of water pressure on their ears. Because a liquid can flow, this pressure isn’t only downward. Pressure is seen acting sideways when water spurts sideways from a leak in the side of an upright can. Pressure also acts upward, as demonstrated when someone tries to push a beach ball beneath the surface of the water. The bottom of a boat is pushed upward by water pressure (buoyancy).

When a liquid presses against a surface, there is a net force that is perpendicular to the surface. Although pressure doesn’t have a specific direction, force does. A submerged triangular block has water forced against each point from many directions, but components of the force that are not perpendicular to the surface cancel each other out, leaving only a net perpendicular point.^[20] This is why water spurting from a hole in a bucket initially exits the bucket in a direction at right angles to the surface of the bucket in which the hole is located. Then it curves downward due to gravity. If there are three holes in a bucket (top, bottom, and middle), then the force vectors perpendicular to the inner container surface will increase with increasing depth – that is, a greater pressure at the bottom makes it so that the bottom hole will shoot water out the farthest. The force exerted by a fluid on a smooth surface is always at right angles to the surface. The speed of liquid out of the hole is , where h is the depth below the free surface.^[20] This is the same speed the water (or anything else) would have if freely falling the same vertical distance h.

Kinematic pressure[edit]

is the kinematic pressure, where is the pressure and constant mass density. The SI unit of P is m²/s². Kinematic pressure is used in the same manner as kinematic viscosity in order to compute the Navier–Stokes equation without explicitly showing the density .

Navier–Stokes equation with kinematic quantities

See also[edit]

Notes[edit]

References[edit]

External links[edit]

• Introduction to Fluid Statics and Dynamics on Project PHYSNET
• Pressure being a scalar quantity
• wikiUnits.org — Convert units of pressure

давление, напряжение, напор, нажим, воздействие, нажатие, сжатие

существительное ↓

Словосочетания

the dial of a pressure gauge — круговая шкала манометра  
relieve the pressure and the stress — снять напряжение и стресс  
normal blood pressure — нормальное давление  
elevated / high blood pressure — повышенное, высокое кровяное давление  
low blood pressure — пониженное давление  
to take smb.’s blood pressure — измерять кровяное давление кому-л.  
loss of cabin pressure — разгерметизация кабины  
to decrease pressure — уменьшать, понижать давление  
disturbance of blood pressure — нарушение кровяного давления  
to equalize pressure — выравнивать давление  
to ease / relieve (the) pressure — ослабить давление  
to face pressure — встретить сопротивление  

Примеры с переводом

Примеры, ожидающие перевода

Возможные однокоренные слова

overpressure  — избыточное давление, чрезмерное давление
pressurize  — герметизировать, оказывать давление, оказывать нажим
underpressure  — разрежение, вакуумметрическое давление
impressure  — давление, след, впечатление, восприятие

Формы слова

verb
I/you/we/they: pressure
he/she/it: pressures
ing ф. (present participle): pressuring
2-я ф. (past tense): pressured
3-я ф. (past participle): pressured

noun
ед. ч.(singular): pressure
мн. ч.(plural): pressures

What do we mean by pressure?

The act of pressing. noun

The condition of being pressed. noun

The application of continuous force by one body on another that it is touching; compression. noun

Force applied uniformly over a surface, measured as force per unit area. noun

Atmospheric pressure. noun

A compelling or constraining influence, such as persuasion or negative attitudes, on the mind or will. noun

An influence acting as a source of distress or hardship. noun

Sustained, effective play that puts an opponent at a disadvantage. noun

The condition of being subjected to physical, mental, social, or economic distress. noun

A physical sensation produced by compression of a part of the body. noun

A mark made by application of force or weight; an impression. noun

To force or try to force, as by influence or persuasion. transitive verb

To pressurize. transitive verb

To pressure-cook. transitive verb

In electricity, a term sometimes used for voltage, electromotive force, or difference of potential. noun

In psychology, the specific quality of sensation furnished by the pressure-spots of the skin and by the organs of the articular sensitivity; pressure-sensation. noun

The intrinsic pressure K is , where σ is the density of the fluid and (ψ)z is the attraction of an infinite layer of a fluid of unit density, bounded by a plane, upon a unit mass at a distance z from the plane. noun

In a compressor, the pressure of the air or gas at the end of the stroke after it is compressed. noun

A pressing; a force applied to a surface.

A contrasting force or impulse of any kind

Distress.

Urgency

Impression; stamp; character impressed.

The amount of force that is applied over a given area divided by the size of this area.

When something or someone is the shit or «that person».
Louisiana slang Urban Dictionary

Problem, it would be said to someone before a fight, got beef Urban Dictionary

N. (heavy dance) music Urban Dictionary

Motion that is not going anywhere. Urban Dictionary

African-american vernacular to define hypertension, or high blood pressure. Urban Dictionary

The uncomfortable feeling you get when you haven’t gotten a blowjob in several years Urban Dictionary

That bomb ass weed. Weed that will make you suffocate. Urban Dictionary

A phrase used to express when you’d like for someone to do something, but you don’t want them to feel pressure to do it immediately or to feel burdened by it; rather, whenever they have the chance or if they can.
It is also used to express when you’re not intending to pressure someone or to soften a request you have for someone so that it doesn’t feel hard, harsh, or demanding.
It can also be used sarcastically, in an event when there really IS pressure to so something. Urban Dictionary

Typically used to say someone is good looking, because they out you under pressure with their flawless looks Urban Dictionary

A name for weed. a florida/south term. Urban Dictionary

From Simple English Wikipedia, the free encyclopedia

Pressure means how much force something is pushing on something else with.
It is expressed as force acting per unit area:

P = F / A

(Pressure = Force divided by Area that force is acting on)

It can also be defined as thrust (compressive force acting perpendicularly to the surface of a body) acting per unit area.

Pressure is directly proportional to force and inversely proportional to area., so the same amount of force applied by a hand will produce less pressure than when applied by something smaller, like a finger.

It is important to understand the distinction between pressure and force. Body A may exert a much larger force on a surface than body B, but if that force is spread out over an area larger than that of body B, the pressure exerted will be less than that of body B. More force is not always equal to more pressure, and vice versa

Pressure is also related to density. If a solid or a fluid is more dense, it has a larger weight, and therefore exerts a larger force, over the same area.

The SI unit of pressure is the Pascal (Pa) named after French physicist Blaise Pascal, who did much work on pressure. 1 pascal = a force of 1 newton per square meter. To measure much larger and much smaller pressures, sub-multiples of the unit, such as kilopascal and megapascal exist.

Atmospheric pressure is the pressure exerted by oxygen and other molecules (the atmosphere basically) on a body/point/area at sea level, and is equal to approximately 100000 Newtons or 100Kn. Atmospheric pressures is measured using instruments such as the barometer which uses the principles of pressure and vacuum to measure the atmospheric pressure.

Other websites[change | change source]

• Pressure -Citizendium

1	1   0 Is defined as the force acting on a surface from another mass per unit area.

2	0   0 pressure The force distributed over a surface, usually measured in pounds force per square inch, or lbf/ in.2, or psi, in US oilfield units.

3	0   0 pressure Force per unit area. The SI unit of pressure is the pascal, defined as one newton per square meter. Other common pressure units are the atmosphere, the bar, and the Torr.

4	0   0 pressure The exertion of force upon a surface by a fluid (e.g., the atmosphere) in contact with it.

5	0   0 pressure «to pressurize,» 1886, American English, from pressure (n.). Meaning «to exert pressure on» (someone) is attested by 1922. Related: Pressured; pressuring.

6	0   0 pressure late 14c., «suffering, anguish; act or fact of pressing on the mind or heart,» from Old French presseure «oppression; torture; anguish; press» (for wine or cheeses), «instrume [..]

7	0   0 pressure Pressure is the force exerted on a given area expressed in pounds per square inch (PSI) or its metric equivalent of kilo Pascals (kPa). Oil and natural gas transported within a pipeline exert pressure on the pipe wall.

8	0   0 pressure force pressed on an object by another object or condition, such as gravity.

9	0   0 pressure Pressure is defined as the Force exerted per unit area. The SI unit of pressure is the Pa Pascal or N/m2 Newton per square metre.

10	0   0 pressure When used specifically with drip irrigation systems, pressure refers to how much force the water creates moving through the main line tubing. Pressure is measured in PSI and must be sufficient to move [..]

11	0   0 pressure the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit); "the compressed gas exerts an increased pressure" coerce: to cause to do th [..]

12	0   0 pressure A taste of anxiety that you feel when you have a three foot slippery

13	0   0 pressure A force being exerted on part of a surface. When you stand, your feet put pressure on the ground. Air pressure refers to air molecules pressing against a surface, like the bottom of a wing.

14	0   0 pressure Force per unit area, usually expressed in pounds per square inch.

15	0   0 pressure The sum of atmospheric and gage pressures.

16	0   0 pressure force or weight pushing against something

17	0   0 pressure (symbol: p or sometimes P) The force per unit area applied to an object in a direction perpendicular to the surface. Atmospheric pressure is sometimes defined as the force per unit area exerted agains [..]

18	0   0 pressure force + unit area. For purposes of this document, refers to PSIG (pounds per square inch gauge).

19	0   0 pressure the pressure at which rupture occurs.

20	0   0 pressure the pressure at which the convolutions of a metal hose become permanently deformed.

21	0   0 pressure relative pressure between inside and outside of an assembly.

22	0   0 pressure the maximum pressure at which a hose or hose assembly is designed to be used.

23	0   0 pressure see Pressure, working.

24	0   0 pressure a nondestructive pressure test applied to hose assemblies.

25	0   0 pressure a rapid change in pressure above and below the normal base pressure, usually associated with reciprocating type pumps.

26	0   0 pressure see Pressure, maximum allowable working.

27	0   0 pressure see Working pressure.

28	0   0 pressure the peak value of a sudden increase of pressure in a hydraulic or pneumatic system producing a shock wave.

29	0   0 pressure the maximum pressure to which a hose will be subjected, including the momentary surges in pressure, which can occur during service. Abbreviated as WP.

30	0   0 pressure Real or perceived serious demands imposed on one person by another individual or group.

31	0   0 pressure drikung

32	0   0 pressure druk

33	0   0 pressure In a gun or cartridge, the force imparted to various components that is developed by the expanding gases generated by the deflagration of the propellant when fired.

34	0   0 pressure The volume of a gas is affected by temperature and pressure. If the temperature increases the gas expands (i.e. its volume increases), and vice versa. If the temperature is kept constant, and the pressure is increased, the volume decreases proportionately.

35	0   0 pressure The force applied to a unit area of surface often measured in pascals (SI unit) eg. “the compressed gas exerts an increased pressure”. Pressure = Force / Area

36	0   0 pressure The force exerted by one body on another, measured as force over area e.g. newtons per square metre.

37	0   0 pressure The force per unit area; p = F/A.

38	0   0 pressure  – Force per unit area relative to atmospheric pressure.  Usually expressed in pounds per square inch.

39	0   0 pressure The force or thrust exerted on a surface, normally expressed as force per unit area. Pressure is exerted in all directions in a system. Common examples are air pressure in a tire or water pressure at [..]

40	0   0 pressure the force pushing on an area or surface Properties

41	0   0 pressure The unit of measure used for PAP machines, measure in centimeters of water pressure (cm H20). Pressures range from 4 cms H2O to 20+ cms of H20.

42	0   0 pressure Pressure is the amount of force that is placed on the bag's seal area as the bag is being heated and sealed.  The three critical elements involved in creating a good bag seal are Pressure [..]

43	0   0 pressure force exerted per unit area.

44	0   0 pressure Force per unit area.

45	0   0 pressure Defined as force per unit area; for example, pounds per square inch (lb/in^2)

46	0   0 pressure Force acting per unit area.

47	0   0 pressure The load applied to an object per unit surface area.

48	0   0 pressure force per unit area acting on a surface perpendicular to the surface

49	0   0 pressure (physics) The amount of force that is applied over a given area divided by the size of this area.

50	0   0 pressure (n) the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit)(n) a force that compels(n) the act of pressing; the exertion of pressure(n) the state of deman [..]

51	0   0 pressure A force applied over an area (Lessons 6, 12)

52	0   0 pressure the amount of force per unit area measured in units of atmospheres (atm)

53	0   0 pressure The force exerted by the interaction of the atmosphere and gravity. Also known as atmospheric pressure.

54

0   0 pressure is a funamental dynamical variable defined as a force/area. For a fluid at rest, the pressure is due to the weight of the water that equals to the mass multiplied by gravity. Pressure is then mass*gravity/area = density*volume*g/area = density*height*gravity. Thus the distribution of pressure in the ocean is determined by both the density of the se [..]

55	0   0 pressure the application of a steady force upon another object.

56	0   0 pressure TEMPERATURE RELATIONSHIP — The change effected in temperature when pressure is changed or vice versa. Only used at saturated conditions. An increase in pressure results in a temperature increase. A de [..]

57	0   0 pressure Pressure refers to the application of continuous force by one object on another that it is touching.

58	0   0 pressure TEMPERATURE RELATIONSHIP – The change affected in temperature when pressure is changed or vice versa. Only used at saturated conditions. An increase in pressure results in a temperature increase. A [..]

59	0   0 pressure Force per unit area, usually expressed in pounds per square inch in the English system.

60	0   0 pressure The application of force to something by something else in direct contact with it.

61	0   0 pressure A force based on a certain area, typically pounds per 1 square inch, or PSI. Pressure is not an indication of force generated, unless surface area is known.

62	0   0 pressure Force per unit area. Usually expressed in pounds per square inch (psi), bar or kilopascal (kPa).

63	0   0 pressure A non-destructive pressure test applied to hose assemblies.

64	0   0 pressure The peak value of a sudden increase of pressure in a hydraulic or pneumatic system producing a shock wave.

65	0   0 pressure refers to the force per unit area on the contacts.

66	0   0 pressure force per unit of area.

67	0   0 pressure A force applied over an area.

68	0   0 pressure That pressure at which vapour and liquid, or vapour and solid, can co-exist in stable equilibrium.

69

0   0 pressure Also, Working Pressure; the maximum pressure that specific units of equipment should experience in use. API specifies that the manufacturer clearly mark the Maximum Service Pressure (MSP) on each unit of equipment; the equipment pressure rating limited by the lowest pressure connector on the equipment, or the manufacturers design.  For Test Pres [..]

70

0   0 pressure The hydrostatic pressure applied to equipment to demonstrate the equipment’s capacity to hold pressure. A pressure test on existing equipment in the field should equal but not exceed Maximum Service Pressure. The Test Pressure and procedures for new manufactured equipment, or remanufactured equipment, shall comply with that specified by API. [..]

71	0   0 pressure Barometric pressure

72	0   0 pressure The force per unit area exerted by the weight of the atmosphere above a point on or above the earth’s surface.

73	0   0 pressure Force per unit area.

74	0   0 pressure force exerted on a unit area. The SI unit of pressure is the pascal (Pa).

75	0   0 pressure In flowing air, the total pressure minus velocity pressure. The portion of the pressure that pushes equally in all directions. Preventative Maintenance

76	0   0 pressure In flowing air, the pressure due to velocity and density of air.

77	0   0 pressure In flowing air, the total pressure minus velocity pressure, pushing equally in all directions.

78	0   0 pressure In flowing air, the sum of the static and velocity pressures.

79	0   0 pressure In flowing air, the total pressure minus velocity pressure, pushing equally in all directions.

80	0   0 pressure In flowing air, the sum of the static and velocity pressures.

81	0   0 pressure In flowing air, the pressure due to velocity and density of air.

82	0   0 pressure A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

83	0   0 pressure The force per unit area that the air exerts on any surface in contact with it. Primarily used for articles pertaining to air Pressure within a closed Environment.

84	0   0 pressure Blood Pressure within Aorta

85	0   0 pressure Difference between systolic and diastolic Pressures within Aorta

86	0   0 pressure The Blood Pressure in the Arteries. It is commonly measured with a Sphygmomanometer on the upper arm which represents the arterial Pressure in the Brachial Artery.

87	0   0 pressure The Pressure at any point in an Atmosphere due solely to the weight of the atmospheric Gases above the point concerned.

88	0   0 pressure Pressure of the Blood on the Arteries and other Blood Vessels.

89	0   0 pressure The Blood Pressure in the central large Veins of the body. It is distinguished from peripheral Venous Pressure which occurs in an extremity.

90	0   0 pressure Manometric Pressure of the CEREBROSPINAL FLUID as measured by lumbar, cerebroventricular, or cisternal Puncture. Within the cranial cavity it is called Intracranial Pressure.

91	0   0 pressure Increased Pressure within the cranial vault. This may result from several conditions, including Hydrocephalus; Brain Edema; intracranial masses; severe systemic Hypertension; Pseudotumor Cerebri; and [..]

92	0   0 pressure The Pressure due to the weight of fluid.

93	0   0 pressure The Pressure within the CARDIAC ATRIUM. It can be measured directly by using a Pressure Catheter (see Heart Catheterization). It can be also estimated using various imaging techniques or other Pressur [..]

94	0   0 pressure The Pressure of the fluids in the eye.

95	0   0 pressure The average Pressure during the aortic Pulse cycle.

96	0   0 pressure The average Arterial Pressure during a single cardiac cycle. It can be estimated as diastolic Blood Pressure plus one third of the difference of diastolic and systolic Blood Pressures.

97	0   0 pressure The Pressure required to prevent the passage of solvent through a semipermeable Membrane that separates a pure solvent from a solution of the solvent and solute or that separates different concentrati [..]

98	0   0 pressure The Pressure that would be exerted by one component of a mixture of Gases if it were present alone in a container. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

99	0   0 pressure The Venous Pressure measured in the Portal Vein.

100	0   0 pressure The Blood Pressure as recorded after wedging a Catheter in a small Pulmonary Artery; believed to reflect the Pressure in the pulmonary Capillaries.

101	0   0 pressure Difference between systolic and diastolic Pressures.

102	0   0 pressure Pressure within the cranial cavity. It is influenced by Brain mass, the circulatory system, CSF dynamics, and Skull rigidity.

103	0   0 pressure The contribution to barometric Pressure of gaseous substance in equilibrium with its solid or liquid phase.

104	0   0 pressure The Blood Pressure in the Veins. It is usually measured to assess the filling Pressure to the Heart Ventricle.

105	0   0 pressure The Pressure within a Cardiac Ventricle. Ventricular Pressure waveforms can be measured in the beating Heart by Catheterization or estimated using imaging techniques (e.g., Doppler Echocardiography). [..]

106	0   0 pressure The force exerted by the column of air above a point to the top of the atmosphere.

107	0   0 pressure Force per unit area, measured in pounds per square inch (psi).

108	0   0 pressure The total pressure measured from absolute zero (i.e. from an absolute vacuum).

109	0   0 pressure See Critical Pressure.

110	0   0 pressure The pressure at the discharge connection of a compressor. (In the case of compressor packages, this should be at the discharge connection of the package)

111	0   0 pressure The absolute total pressure at the inlet connection of a compressor.

112	0   0 pressure The pressure measured in a flowing stream in such a manner that the velocity of the stream has no effect on the measurement.

113	0   0 pressure The pressure that would be produced by stopping a moving stream of liquid or gas. It is the pressure measured by an impact tube.

114	0   0 pressure The total pressure minus the static pressure in an air or gas stream.

115	0   0 pressure The force exerted by the weight of the atmosphere, also known as atmospheric pressure. When measured on a barometer, it is referred to as barometric pressure and it is expressed in inches of mercury, millibars, or kiloPascals.

116	0   0 pressure In flowing air, Static Pressure is the total pressure minus velocity pressure. Static Pressure is the portion of the pressure that pushes equally in all directions.

117	0   0 pressure In flowing air, Total Pressure is the sum of the static pressure and the velocity pressure.

118	0   0 pressure In flowing air, Velocity Pressure is the pressure due to the velocity and density of the air.

119	0   0 pressure See atmospheric pressure.

120	0   0 pressure Barometric pressure

121

0   0 pressure Pressure involves using a sequence of attacks to keep an opponent on the defensive and often involves okizeme and mix up tactics. The purpose of pressure is to keep an enemy from effectively attacking back until they make a mistake, usually allowing for a damaging command move or combo to be performed.

122

0   0 pressure Pressure is to use sets of attacks that keep the opponent on the defensive. This often utilizes alot of mix-ups, a good ground game (okizeme). The whole purpose of applying pressure in a match is so that you put your opponent into a defensive state to the point that they become desperate and throw out a move that you can punish them for their mista [..]

123	0   0 pressure To advance a runner

124	0   0 pressure 1. A tactic used to attempt to dispossess an opponent of the ball. Generally refers to the close proximity of the defender. 2. Used as an instruction to tell a player to apply pressure to an opponent who has possession of the ball.

125	0   0 pressure (adjective for call or, more commonly, bid) made with options restricted by the opponents’ bidding

126	0   0 pressure An increase in the force exerted on something above standard atmospheric conditions, measured as gauge pressure (psig, bar g).

127	0   0 pressure The exertion of force upon a surface by a fluid (e.g., the atmosphere) in contact with it.

128	0   0 pressure The force exerted against an opposing body or the thrust distributed over a surface, expressed in weight per unit of area (Newton per square meter or Pa) Absolute — The pressure above zero pressure, t [..]

129	0   0 pressure The measure of force per unit area, conveyed in pounds per square inch.

130

0   0 pressure Therapy devices measure the force of air delivered to you in units of pressure (ie, centimeters of water, or cm H2O). For example, if your care provider prescribes a therapy pressure of 25 cm H2O, then that’s the force of air needed to keep your airway open to minimize or avoid apneas.

131	0   0 pressure Pounds-Per-Square-Inch: A rating of Air Pressure in the system.

132	0   0 pressure Intake pressure is the absolute total pressure at the inlet flange of a compressor.

133	0   0 pressure The potential pressure exerted in all directions by a fluid at rest. For a fluid in motion it is measured in a direction normal to the direction of flow, usually expressed in inches water gauge when d [..]

134	0   0 pressure The force exerted by the weight of the atmosphere and gravity. Different units: atmospheres (atm), millibars (mb), pascals (Pa), inches of mercury (in), pounds per square inch (PSI), etc. Meteorologists most often use mb.

135	0   0 pressure  To arrange your checkers so as to directly bear on an opponents blot often forcing them to move it on their next turn. It may be important to make an action play after your opponent has escaped t [..]

136	0   0 pressure Pressure is a force divided by the area that the force is transferred through. When the same force is transferred through a smaller area, the pressure will increase.

137	0   0 pressure Pressure is a similar idea to stress, the force intensity at a point, except that pressure means something acting on the surface of an object rather than within the material of the object. When discussing the pressure within a fluid, the meaning is equivalent to stress. back to topQ

138	0   0 pressure The direct environmental effect of a Driver (e.g., altered flow conditions, changing water chemistry,  organic pollution,  water abstraction).

139	0   0 pressure Pressure above that of a perfect vacuum; the sum of gauge pressure and atmospheric pressure.

140

0   0 pressure The pressure of the weight of air and water vapor on the earth’s surface. The average atmospheric pressure at sea level has been defined for scientific purposes as 14.696 pounds per square inch. The American Gas Association, the FERC and all other federal agencies have adopted 14.73 lbs. per square inch as the standard pressure base.

141	0   0 pressure A standard pressure to which measurements of a volume of natural gas are referred.

142	0   0 pressure presh-er, vol-yoom and tem-per-uh-cher uh-nal-uh-sis Examination of reservoir fluid in a laboratory under various pressures, volumes, and temperatures to determine the characteristics and behavior of the fluid.

143	0   0 pressure the force distributed over a surface, usually measured in pounds force per square inch, or psi, in US oilfield units.

144	0   0 pressure the sum of atmospheric and gage pressures.

145	0   0 pressure pressure exerted by the atmosphere at any specific location. (Sea level pressure is approximately 14.7 pounds per square inch absolute.)

146	0   0 pressure the pressure encountered on the return side of a system.

147	0   0 pressure the pressure at which a pressure operated valve begins to pass fluid.

148	0   0 pressure the qualified operating pressure which is recommended for a component or a system by the manufacturer.

149	0   0 pressure the pressure which overcomes the total resistances in a system. It includes all losses as well as useful work.

150

0   0 pressure The force that a fluid (liquid or gas) exerts uniformly in all directions within a vessel, pipe, hole in the ground, and so forth, such as that exerted against the inner wall of a tank or that exerted on the bottom of the well bore by a fluid. Pressure is expressed in terms of force exerted per unit of area, as pounds per square inch, or in kilopas [..]

151

0   0 pressure The force per unit area. In meteorology, pressure refers to the weight of air in a column directly above a point. The standard atmospheric pressure at mean sea level is 1013.25 hPa, though surface pressures of 870 hPa (Typhoon Tip, October 1979) and 1084 hPa (Agata, Siberia, December 1968) have been recorded.

152	0   0 pressure The barometric pressure is the force exerted by the weight of the atmosphere above.

153	0   0 pressure is expressed for compression stockings as mmHg (= mm mercury) or hPa (hectopascal). Pa = SI unit of pressure, 1 mmHg = 133322 Pa). The pressure that a stocking exerts on the leg can only be determined [..]

154	0   0 pressure The force exerted by the interaction of the atmosphere and gravity. Also known as atmospheric pressure.

155	0   0 pressure The force exerted by the interaction of the atmosphere and gravity. Also known as atmospheric pressure. Radar

156	0   0 pressure The force per unit area exerted by the weight of the atmosphere above a point on or above the earth’s surface.

157	0   0 pressure The force per unit area exerted by the weight of the atmosphere

158	0   0 pressure The force per unit area exerted by the weight of the atmosphere above a point on or above the earth’s surface. Also known as atmospheric pressure or barometric pressure.

159	0   0 pressure The exertion of force upon a surface by a fluid (e.g., the atmosphere) in contact with it.

160	0   0 pressure The force per unit area exerted by the weight of the atmosphere above a point on or above the earth’s surface.

161	0   0 pressure The normal force exerted by a homogeneous liquid or gas, per unit of area, on the wall of its container.

162	0   0 pressure Pressure referred to that of a perfect vacuum. It is the sum of gauge pressure and atmospheric pressure.

163	0   0 pressure It is the pressure indicated by a barometer. Standard atmosphere is the pressure equivalent

164	0   0 pressure Vapor pressure corresponding to the substance’s critical state at which the liquid and vapor have identical properties.

165	0   0 pressure Gauge: Pressure above atmospheric.

166	0   0 pressure The normal force per unit area that would be exerted by a moving fluid on an infinitesimally small body immersed in it if the body were carried along with the fluid.

167	0   0 pressure Pressure at which a system is operating.

168	0   0 pressure Portion of total gas pressure of a mixture attributable to one component.

169	0   0 pressure The saturation pressure for a pure substance for any given temperature is that pressure at which vapor and liquid, or vapor and solid, can coexist in stable equilibrium.

170	0   0 pressure The normal force per unit area that would be exerted by a moving fluid on a small body immersed in it if the body were carried along with the fluid. Practically, it is the normal force per unit are at [..]

171	0   0 pressure In the theory of the flow of fluids, the sum of the static pressure and the velocity pressure at the point of measurement. Also called dynamic pressure.

172	0   0 pressure The partial pressure exerted by the water vapor contained in air.

173	0   0 pressure HEAT DIAGRAM — Graph of refrigerant pressure, heat and temperature properties. (Mollier’s diagram.)

174	0   0 pressure VELOCITY COMPOUNDING —

175	0   0 pressure The force per unit area acting on a surface.

176	0   0 pressure Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.: 445  Gauge pressure (also spelled gage pressure) is th [..]

177	0   0 pressure Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.: 445  Gauge pressure (also spelled gage pressure) is th [..]

178	0   0 pressure «Pressure» is a song by American rock band Paramore, released on August 2, 2005 as their debut single from their debut studio album, All We Know Is Falling. It failed to chart the Billboard Hot 100, [..]

179	0   0 pressure «Pressure» is a 1982 song by American musician Billy Joel about the pressure of creating and the pressure of being a provider. The synthesizer-driven rock song was a single from the album The Nylon Cu [..]

180	0   0 pressure «Pressure» is the first single from Canadian rapper Belly’s debut album, The Revolution. The song features established R&B artist Ginuwine, and it received heavy rotation on MuchMusic.

181	0   0 pressure Pressure is an effect which occurs when a force is applied on a surface. Pressure may also refer to:

182	0   0 pressure Pressure is a Reggae album by Maiko Zulu. The album was produced in 2003 with the hit song pressure.

183	0   0 pressure Babylon is the debut studio album by Welsh heavy metal band Skindred. The band was formed from members of the disbanded band Dub War, including leader Benji Webbe, and signed to RCA Records in 2002, w [..]

184	0   0 pressure Delyno Brown (born August 5, 1981), better known as Pressure or Pressure Busspipe, is a reggae musician from Saint Thomas, U.S. Virgin Islands.He gained his early experience working on the Star Lion s [..]

185	0   0 pressure «Pressure» is a song by Nadia Ali, Starkillers and Alex Kenji. It was released on February 15, 2011 by Spinnin’ Records. The song reached No. 16 on the Ultratip Chart in Wallonia, Belgium.

186	0   0 pressure Pressure is an effect which occurs when a force is applied on a surface. Pressure may also refer to:

187	0   0 pressure Pressure is a play written by David Haig. It made its world premiere at the Royal Lyceum Theatre, Edinburgh in May 2014, a year later than originally planned, before transferring to the Chichester Fes [..]

188	0   0 pressure «Pressure» is the third track and third British single from the Kinks’ 1979 album, Low Budget. It was written by Ray Davies.

189	0   0 pressure «Pressure» is a song by American indie pop band Youngblood Hawke.

190	0   0 pressure «Pressure» is a 1991 dance single recorded by the British techno group Sunscreem, and written and produced by band members Paul Carnell and lead singer Lucia Holm from the act’s 1993 set *O3. «Pressur [..]

191	0   0 pressure Pressure is a 2015 British disaster survival film directed by Ron Scalpello. It tells the story of four men who get stuck at the bottom of the ocean in a diving bell.

192

0   1 pressure The pressure created by the continual renewal of fluids within the eye. The intraocular pressure is increased in glaucoma. In acute angle-closure glaucoma, the intraocular pressure rises because the canal into which the fluid in the front part of the eye normally drains is suddenly blocked. In chronic glaucoma, there is a gradual imbalance between [..]

193

0   1 pressure Any blood pressure that is below the normal expected for an individual in a given environment. Low blood pressure is also referred to as hypotension. Low blood pressure is a relative term because the blood pressure normally varies greatly with activity, age, medications, and underlying medical conditions. Low blood pressure can result from conditio [..]

194	0   2 pressure force per unit area, usually expressed in pounds per square inch.

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pressure — перевод на русский

/ˈprɛʃə/

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Princeton’s WordNetRate this definition:4.3 / 10 votes

1. pressure, pressure level, force per unit areanoun

   the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit)

   «the compressed gas exerts an increased pressure»

2. pressurenoun

   a force that compels

   «the public brought pressure to bear on the government»

3. press, pressure, pressingnoun

   the act of pressing; the exertion of pressure

   «he gave the button a press»; «he used pressure to stop the bleeding»; «at the pressing of a button»

4. imperativeness, insistence, insistency, press, pressurenoun

   the state of demanding notice or attention

   «the insistence of their hunger»; «the press of business matters»

5. pressure, pressure sensationnoun

   the somatic sensation that results from applying force to an area of skin

   «the sensitivity of his skin to pressure and temperature was normal»

6. pressurenoun

   an oppressive condition of physical or mental or social or economic distress

7. atmospheric pressure, air pressure, pressureverb

   the pressure exerted by the atmosphere

8. coerce, hale, squeeze, pressure, forceverb

   to cause to do through pressure or necessity, by physical, moral or intellectual means :»She forced him to take a job in the city»

   «He squeezed her for information»

9. blackmail, blackjack, pressureverb

   exert pressure on someone through threats

WiktionaryRate this definition:2.0 / 1 vote

1. pressurenoun

   The amount of force that is applied over a given area divided by the size of this area.

   Units

2. pressurenoun

   A pressing; a force applied to a surface.

   Apply pressure to the wound to stop the bleeding.

3. pressurenoun

   Mental strain caused by one’s own or others’ expectations on one’s own performance

4. pressureverb

   To encourage or heavily exert force or influence.

   Do not let anyone pressure you into buying something you do not want.

Samuel Johnson’s DictionaryRate this definition:0.0 / 0 votes

1. Pressurenoun

   Etymology: from press.

   1. The act of pressing or crushing.2. The state of being pressed or crushed.3. Force acting against any thing; gravitation; pression.

   The inequality of the pressure of parts appeareth in this; that if you take a body of stone, and another of wood of the same magnitude and shape, and throw them with equal force, you cannot throw the wood so far as the stone.
   Francis Bacon.

   Although the glasses were a little convex, yet this transparent spot was of a considerable breadth, which breadth seemed principally to proceed from the yielding inwards of the parts of the glasses, by reason of their mutual pressure.
   Newton.

   The blood flows through the vessels by the excess of the force of the heart above the incumbent pressure, which in fat people is excessive.
   Arbuthnot.

   4. Violence inflicted; oppression.

   A wise father ingenuously confessed, that those, which persuaded pressure of consciences, were commonly interested therein.
   Francis Bacon, Essays.

   5. Affliction; grievance; distress.

   Mine own and my people’s pressures are grievous, and peace would be very pleasing.
   Charles I .

   The genuine price of lands in England would be twenty years purchase, were it not for accidental pressures under which it labours.
   Josiah Child, Discourse of Trade.

   To this consideration he retreats, in the midst of all his pressures, with comfort; in this thought, notwithstanding the sad afflictions with which he was overwhelmed, he mightily exults.
   Francis Atterbury, Sermons.

   Excellent was the advice of Elephas to Job, in the midst of his great troubles and pressures, acquaint thyself now with God, and be at peace.
   Francis Atterbury.

   6. Impression; stamp; character made by impression.

   From my memory
   I’ll wipe away all trivial fond records,
   All saws of books, all forms, all pressures past,
   That youth and observation copy’d there.
   William Shakespeare.

WikipediaRate this definition:0.0 / 0 votes

1. Pressure

   Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.: 445  Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure.
   Various units are used to express pressure. Some of these derive from a unit of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per square metre (N/m2); similarly, the pound-force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in the imperial and U.S. customary systems. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure, and the torr is defined as 1⁄760 of this. Manometric units such as the centimetre of water, millimetre of mercury, and inch of mercury are used to express pressures in terms of the height of column of a particular fluid in a manometer.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Pressurenoun

   the act of pressing, or the condition of being pressed; compression; a squeezing; a crushing; as, a pressure of the hand

2. Pressurenoun

   a contrasting force or impulse of any kind; as, the pressure of poverty; the pressure of taxes; the pressure of motives on the mind; the pressure of civilization

3. Pressurenoun

   affliction; distress; grievance

4. Pressurenoun

   urgency; as, the pressure of business

5. Pressurenoun

   impression; stamp; character impressed

6. Pressurenoun

   the action of a force against some obstacle or opposing force; a force in the nature of a thrust, distributed over a surface, often estimated with reference to the upon a unit’s area

7. Etymology: [OF., fr. L. pressura, fr. premere. See 4th Press.]

FreebaseRate this definition:5.0 / 1 vote

1. Pressure

   Pressure is the ratio of force to the area over which that force is distributed.
   Pressure is force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure is the pressure relative to the local atmospheric or ambient pressure. Pressure is measured in any unit of force divided by any unit of area. The SI unit of pressure is which is called the pascal after the seventeenth-century philosopher and scientist Blaise Pascal. A pressure of 1 Pa is small; it approximately equals the pressure exerted by a dollar bill resting flat on a table. Everyday pressures are often stated in kilopascals.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Pressure

   presh′ūr, n. act of pressing or squeezing: the state of being pressed: impulse: constraining force or influence: that which presses or afflicts: difficulties: urgency: strong demand: (physics) the action of force on something resisting it.—Centre of pressure (see Centre). [O. Fr.,—L. pressura—premĕre, to press.]

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Pressure

   A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

The Standard Electrical DictionaryRate this definition:0.0 / 0 votes

1. Pressure

   Force or stress exerted directly against any surface. Its dimensions are force/area or ((M*L)/(T^2)) / (L^2) = M/(L* (T^2)).

Matched Categories

1. • Distress
   • Force
   • Push
   • Somatic Sensation

British National Corpus

1. Spoken Corpus Frequency

   Rank popularity for the word ‘pressure’ in Spoken Corpus Frequency: #828

2. Written Corpus Frequency

   Rank popularity for the word ‘pressure’ in Written Corpus Frequency: #1037

3. Nouns Frequency

   Rank popularity for the word ‘pressure’ in Nouns Frequency: #280

How to pronounce pressure?

How to say pressure in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of pressure in Chaldean Numerology is: 7

2. Pythagorean Numerology

   The numerical value of pressure in Pythagorean Numerology is: 4

Examples of pressure in a Sentence

1. Josh Holmes:

   Republicans have these little cylinders, when the water pressure is low, Josh Holmes can’t tell much difference between Republican online fundraising and Democratic online fundraising. But when the water pressure is really high, like it was in 2018, there’s a huge difference.

2. Shephal Doshi:

   Dehydration can cause changes in your body’s electrolytes and also lowers blood pressure, this puts stress on the body and, as a result, could cause an abnormal heartbeat.

3. Ken Hasegawa:

   Following the long and steep decline in oil prices, we have seen some buying interest in recent days, but there is still a lot of selling pressure.

4. Hans Boeckler Foundation:

   In this case, it is not the customers, who evaluate a product, but the employees themselves who evaluate each other, this increases the perception of a competitive situation among employees, which in turn creates pressure to perform, self-discipline and stress.

5. Chris Hansen:

   What you saw today was a prototype of the pressure garment. The life support system is back in a lab in Houston, we want systems that allow our astronauts to be scientists on the surface of the moon.

Popularity rank by frequency of use

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The pressure, the heat, the almost impossibly fast pace at which you need work — this is the reality of working in the culinary industry. This is what professional chefs do night after night.

Joe Bastianich

ETYMOLOGY OF THE WORD PRESSURE

From Late Latin pressūra a pressing, from Latin premere to press.

PRONUNCIATION OF PRESSURE

GRAMMATICAL CATEGORY OF PRESSURE

Pressure is a verb and can also act as a noun.

WHAT DOES PRESSURE MEAN IN ENGLISH?

Definition of pressure in the English dictionary

The first definition of pressure in the dictionary is the state of pressing or being pressed. Other definition of pressure is the exertion of force by one body on the surface of another. Pressure is also a moral force that compels.

CONJUGATION OF THE VERB TO PRESSURE

PRESENT

PAST

FUTURE

CONDITIONAL

IMPERATIVE

NONFINITE VERB FORMS

WORDS THAT RHYME WITH PRESSURE

SYNONYMS OF «PRESSURE»

The following words have a similar or identical meaning as «pressure» and belong to the same grammatical category.

TRANSLATION OF PRESSURE

Find out the translation of pressure to 25 languages with our English multilingual translator.

TENDENCIES OF USE OF THE TERM «PRESSURE»

The term «pressure» is very widely used and occupies the 3.154 position in our list of most widely used terms in the English dictionary.

Principal search tendencies and common uses of pressure

FREQUENCY OF USE OF THE TERM «PRESSURE» OVER TIME

10 QUOTES WITH «PRESSURE»

Famous quotes and sentences with the word pressure.

10 ENGLISH BOOKS RELATING TO «PRESSURE»

Discover the use of pressure in the following bibliographical selection. Books relating to pressure and brief extracts from same to provide context of its use in English literature.

10 NEWS ITEMS WHICH INCLUDE THE TERM «PRESSURE»

Find out what the national and international press are talking about and how the term pressure is used in the context of the following news items.

REFERENCE

« EDUCALINGO. Pressure [online]. Available <https://educalingo.com/en/dic-en/pressure>. Apr 2023 ».

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure. Various units are used to express pressure.

What is the opposite of pressure?

What is the opposite of pressure?

release	mitigation
relaxation	alleviation
easing	slackening
loosening	reduction
abatement	lessening

Is pressure a synonym for force?

In this page you can discover 83 synonyms, antonyms, idiomatic expressions, and related words for pressure, like: force, tension, pressure sensation, stress, thrust, persuasion, requirement, squeeze, misfortune, repression and unnaturalness.

What is another name for pressure?

What is another word for pressure?

force	load
gravity	heaviness
encumbrance	shear
squeeze	strength
physical force

What is the scientific word for pressure?

Pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid. In SI units, pressure is measured in pascals; one pascal equals one newton per square metre. Atmospheric pressure is close to 100,000 pascals.

What’s another word for applying pressure?

What is another word for apply pressure?

lobby	influence
press	pressure
push	urge
campaign	solicit
sway	appeal

What is another word for high pressure?

What is another word for high-pressure?

aggressive	compelling
bludgeoning	high-powered
insistent	intensive
persistent	persuasive
coercive	importunate

Does high pressure mean hot weather?

For example, in summer, high pressure tends to bring fine, warm weather. However, in winter a high pressure system will be associated with cold and dry days and frost.

What is a high pressure situation?

High-pressure situations tend to make everything seem worse. Instead of looking at that upcoming deadline as another task to complete, you see it as a make-or-break situation that could end your career.

What is meant by high pressure?

1a : having or involving a high or comparatively high pressure especially greatly exceeding that of the atmosphere. b : having a high barometric pressure. 2a : using or involving aggressive and insistent sales techniques. b : imposing or involving severe strain or tension high-pressure occupations. high-pressure.

What causes a high pressure system?

The Earth’s atmosphere exerts pressure on the surface. Areas of high and low pressure are caused by ascending and descending air. As air warms it ascends, leading to low pressure at the surface. As air cools it descends, leading to high pressure at the surface.

Where is high pressure located?

A high pressure system has higher pressure at its center than the areas around it. Winds blow away from high pressure. Swirling in the opposite direction from a low pressure system, the winds of a high pressure system rotate clockwise north of the equator and counterclockwise south of the equator.

Is high pressure one word?

‘… high-pressure system…’ – high and pressure are an adjectival phrase qualifying system. Therefore, hyphenate these words, i.e. ‘high-pressure system’. Therefore, hyphenate these words, i.e. ‘below-ground pipeline’.

Is Rain high or low pressure?

Generally high pressure means fair weather, and low pressure means rain.

What is a synonym for mixture?

admixture

• amalgamation.
• blend.
• combination.
• commixture.
• compound.
• fusion.
• mingling.
• mixture.

What is Moon culmination?

In observational astronomy, culmination is the instant of time of the transit of a celestial object (the Sun, the Moon, a planet, a star, constellation or a deep-sky object) across the observer’s local meridian. The time of culmination (when the object culminates) is often used to mean upper culmination.

What does lower culmination mean?

astronomy. : the crossing of a circumpolar object over the part of the celestial meridian between the visible pole and the horizon.

What is meant by Meridian?

(Entry 1 of 2) 1a(1) : a great circle on the surface of the earth passing through the poles. (2) : the half of such a circle included between the poles. b : a representation of such a circle or half circle numbered for longitude (see longitude sense 1) on a map or globe — see longitude illustration.

What is Meridian very short answer?

A meridian is an imaginary line from the North Pole to the South Pole. Meridians are drawn on maps to help you describe the position of a place.