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Gravitation — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsGravitation1 Mark
Question
Why is the atmosphere much rarer on the moon than on the earth?
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Answer

The value of escape velocity on the moon is small as compared to the value of the earth only 2.5k ms-1. So, the molecules of air escape easily from the surface of moon, hence there is no atmosphere.

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