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Question

Where does the center of gravity of the atmosphere of the earth approximately lie?

A
At the centre of the Earth
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B
At a height equal to one-third the radius of Earth above the Earth's surface
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C
At height equal to half the radius of the Earth above the Earth's surface
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D
At a height equal to the radius of the Earth above the earth's surface
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Solution

The correct option is A At the centre of the Earth
The centre of gravity of the earth lies at the centre of the earth because the mass of the earth is equally distributed in all the directions about it. The earth is surrounded by the atmosphere with nearly equal thickness. Therefore, the centre of gravity of the atmosphere of the earth coincides with the centre of gravity of earth.

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