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Pressure

Pressure is defined as the force exerted per unit area. The SI unit of pressure is the pascal or newton per square metre.

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.

The pressure in a liquid increases with depth.

Conversions
1 bar=1x105 Pa 1 standard atmosphere (atm)=1.01325x105 Pa
1 lbf in-2 (psi)=6894.76 Pa 1 tonf in-2=15.4443x106 Pa
1 torr=1 mmHg 1 mmHg=133.322 Pa
1 inHg=3386.39 Pa 1 inH2O=249.089Pa
1 mmHg=13.5951 mmH2O 1 mmH2O=9.8066 Pa
1 kilo psi=1 ksi 1 ksi=1000 psi
See also: Absolute Pressure, Acoustics, Atmospheric Pressure, Barye, Gauge Pressure, Hydrostatic Pressure, Isobaric, Manometer, Pascal, Pressure Gradient, Standard Atmosphere, Thermodynamic Properties, Vacuum.

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Aerodynamics
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