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Atmospheric Pressure

Atmospheric pressure is the force exerted by the weight of the atmosphere of the Earth at ground level. The value quoted is the standard value but will vary, with variations being measured with a barometer.

1 atmosphere	= 1.01325x10⁵Nm^-2
	= 1.01325 bar
	= 1.01325x10⁶ dynes cm²
	= 14.7 lbf in^-2
	= 76 cm mercury
	= 406.8 in water

The air pressure decreases as the altitude increases.

See also: Barometer, Hypobaric, Pascal′s Law, Pressure, Standard Atmosphere.

Subjects: Physics