On earth, at ??? ?? above mean sea-level, the mean free path exceeds 1 m.
(a)What is the atmospheric pressure at that height?
(b)Estimate the fraction of the total mass of the atmosphere at this height.
Hence account for the existence of the homosphere, heterosphere and the loss of hydrogen from the Earth’s atmosphere into the exosphere.
To solve this problem the details calculations and derivations are given below.
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