Sawaal
7
Q:

Atmospheric pressure exerted on earth is due to

A) gravitational pull B) rotation of earth
C) revolution of earth D) uneven heating of earth

Answer:   A) gravitational pull



Explanation:

The atmospheric pressure at the surface of the Earth is due to gravitational pull of the earth and is about 14.7 psi.

 

That means that the weight of a column of air which has a cross section of 1 square inch and which stretches from the surface of the Earth to space is 14.7 pounds. 

Subject: Physics
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