Question

what is atmospheric pressure ???????​

Answer 1

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Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of the air above that surface. 

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Answer 2

Answer:

Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere of Earth. The standard atmosphere is a unit of pressure defined as 101,325 Pa, which is equivalent to 760 mm Hg, 29.9212 inches Hg, or 14.696 psi.