what is air pressure
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Mate,
The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer.
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atomic pressure known as barometric pressure is the pressure with in the atmosphere of the earth . the standard atmosphere is a unit of pressure defined as 101,325 PA , which is a Evalualent to 760 mm Hg , 29.9212 inches hg , or 14.696 psi.
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