Question

what is atmospheric pressure ??????
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Answer 1

Explanation:

Atmospheric pressure, also known as barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa; 1,013.25 mbar), which is equivalent to 760 mm Hg, 29.9212 inches Hg, or 14.696 psi.[1] The atm unit is roughly equivalent to the mean sea-level atmospheric pressure on Earth; that is, the Earth's atmospheric pressure at sea level is approximately 1 atm.

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Answer 2

Answer:

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• It is the force exerted on a surface by the air above it as gravity pulls it to Earth.
• One atmosphere is 1,013 millibars, or 760 millimeters (29.92 inches) of mercury.