Air pressure is also known as atmospheric pressure. How is it caused?
A
By the heat energy in the air
B
By the wind that blows in the air
C
By water vapour in the air
D
By the air around us that presses on the surfaces of objects
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Solution
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Correct option is D)
The pressure exerted by air around us is known as atmospheric pressure.
If we imagine a unit area and a very long cylinder standing on it filled with air, then the weight of the air in this cylinder is the atmospheric pressure.
