________ is the weight of air (atmosphere).

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Multiple Choice

________ is the weight of air (atmosphere).

Explanation:
Atmospheric pressure is the weight of air pressing on everything at the Earth’s surface. It’s the force per unit area exerted by the column of air above you, due to gravity. At sea level this pressure is about 14.7 psi. This concept is distinct from hydraulics, which deals with fluid pressure in pipes and systems; gauge pressure, which is pressure relative to atmospheric; and vacuum pressure, which is pressure below atmospheric. So the weight of air—the atmosphere itself—defines atmospheric pressure.

Atmospheric pressure is the weight of air pressing on everything at the Earth’s surface. It’s the force per unit area exerted by the column of air above you, due to gravity. At sea level this pressure is about 14.7 psi. This concept is distinct from hydraulics, which deals with fluid pressure in pipes and systems; gauge pressure, which is pressure relative to atmospheric; and vacuum pressure, which is pressure below atmospheric. So the weight of air—the atmosphere itself—defines atmospheric pressure.

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