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Escape velocity for the Earth refers to the minimum speed an object must have to leave the Earth and never return. (a) The escape velocity for the Moon is about one-fifth what it is for the Earth due to the Moon’s smaller mass; explain why the Moon has practically no atmosphere. (b) If hydrogen was once in the Earth’s atmosphere, why would it have probably escaped?
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Modified Mastering Physics With Pearson Etext -- Standalone Access Card -- For Physics For Scientists & Engineers With Modern Physics (5th Edition)
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