**Pressure** (the symbol: *p*) is the ratio of force to the area over which that force is distributed. In other words, pressure is force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure (also spelled *gage* pressure) is the pressure relative to the local atmospheric or ambient pressure. While pressure may be measured in any unit of force divided by any unit of area, the SI unit of pressure (the newton per square metre) is called the *pascal* (Pa) 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 (1 kPa = 1000 Pa).

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### Other articles related to "pressure, pressures":

**Pressure**

... High

**pressure**in science and engineering is studying the effects of high

**pressure**on materials and the design and construction of devices, such as a ... By high

**pressure**it is usually meant

**pressures**of thousands (kilobars) or millions (megabars) of times atmospheric

**pressure**(about 1 bar or 100,000 Pa) ... received a Nobel prize for advancing this area of physics by several magnitudes of

**pressure**(400 MPa to 40,000 MPa) ...

... Meteorologists worldwide have for a long time measured atmospheric

**pressure**in bars, which was originally equivalent to the average air

**pressure**on Earth the bar was divided into a thousand millibars to provide the ... After the introduction of SI units, many preferred to preserve the customary

**pressure**figures ... as 100,000 pascals, which is only slightly lower than standard air

**pressure**on Earth ...

... The pascal (symbol Pa) is the SI derived unit of

**pressure**, internal

**pressure**, stress, Young's modulus and tensile strength, named after the French mathematician, physicist, inventor, writer, and ... On Earth, standard atmospheric

**pressure**is 101 325 Pa ... Meteorological barometric

**pressure**reports typically report atmospheric

**pressure**in hectopascals ...

**Pressure**

... is the kinematic

**pressure**, where is the

**pressure**and constant mass density ... Kinematic

**pressure**is used in the same manner as kinematic viscosity in order to compute Navier-Stokes equation without explicitly showing the density ...

... The pascal (Pa) or kilopascal (kPa) as a unit of

**pressure**measurement is widely used throughout the world and has largely replaced the pounds per square inch ... Other, older units of measure occasionally used for

**pressure**are millimeters of mercury (Torr) and millimetres of water (1.0 mmH2O = 9.80665 Pa) ... In the cgs system, the unit of

**pressure**is the barye (symbol ba), which is equal to one decipascal ...

### Famous quotes containing the word pressure:

“The area [of toilet training] is one where a child really does possess the power to defy. Strong *pressure* leads to a powerful struggle. The issue then is not toilet training but who holds the reins—mother or child? And the child has most of the ammunition!”

—Dorothy Corkville Briggs (20th century)

“The mother whose self-image is dependent on her children places on those children the responsibility for her own identity, and her involvement in the details of their lives can put great *pressure* on the children. A child suffers when everything he or she does is extremely important to a parent; this kind of over-involvement can turn even a small problem into a crisis.”

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“Much of the *pressure* contemporary parents feel with respect to dressing children in designer clothes, teaching young children academics, and giving them instruction in sports derives directly from our need to use our children to impress others with our economic surplus. We find “good” rather than real reasons for letting our children go along with the crowd.”

—David Elkind (20th century)