A simple question,
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送交者: 唐好色 于 2007-03-04, 22:22:22:
回答: of course satellites have to overcome drag, which mostly come 由 steven 于 2007-03-03, 15:14:58:
The atmosphere thins out gradually as one goes into space. What is the approximate quantitative relation between pressure and height? Also where do people in this business consider to be the "edge" beyond which the atmosphere is "truly" negligible?
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