what is air pressure ? state the units to measure pressire:
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One atmosphere (101.325 kPa or 14.7 psi) is also the pressure caused by the weight of a column of fresh water of approximately 10.3 m (33.8 ft). Thus, a diver 10.3 m underwater experiences a pressure of about 2 atmospheres (1 atm of air plus 1 atm of water).
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Air pressure is the weight of the atmosphere pressing down on the earth .It is measured by a barometer in units called millibars. unit of pressure: 1.pascal[pa] (S.I. unit of pressure) 2.one Newton per square meter.
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