What do u understand by atmospheric pressure?
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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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the atmospheric air extends up to many km above the surface of the earth.
The pressure exerted by the air is known as atmospheric pressure.
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