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Question

Which of the following is true about atmospheric pressure?

A
It is the desnity of cloud cover in the atmosphere.
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B
It is the amount of water vapour in the atmosphere.
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C
It is the weight of air column above an area.
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D
It is the measure of wind speed.
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Solution

The correct option is C It is the weight of air column above an area.
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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