What is Atmospheric Pressure in Physics

Atmospheric Pressure in Physics


Atmospheric pressure is measured by barometers.


Atmospheric pressure measured by a simple mercury barometer can be calculated using the formula

p = h g


Standard atmospheric pressure at sea level is usually 76 cm Hg or 10 m water. It can also be expressed as 1 bar.


(Note: cm Hg is an accepted unit of atmospheric pressure. Other similar units involving different liquids are also accepted)


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