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At what temperature is v(rms) of H(2) mo...

At what temperature is `v_(rms)` of `H_(2)` molecules equal to the escape speed from earth's surface. What is the corresponding temperature for escape of hydrogen from moon's surface ? Given `g_m = 1.6 m//s^(2), R_e = 6367 km "and" R_m = 1750 km`.

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