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What is air pressure?
Air pressure is the weight of the atmosphere pressing down on the earth.
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Asked 3/2/2009 10:05:56 AM
Updated 5/26/2016 1:05:53 PM
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Edited by yumdrea [5/26/2016 1:05:41 PM]
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Air pressure is the weight of the atmosphere pressing down on the earth.

Added 5/26/2016 1:05:53 PM
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