what is meant by atmostic pressure
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ं़़ं्ऋऋऋ है कि ््ं़ंंं ््् ़ं़़ है कि
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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. In a barometer, a column of mercury in a glass tube rises or falls as the weight of the atmosphere changes.
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