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thanks for the help, i just solved it and did not have time to update the thread.

Please help me, i dont even know where to begin.

"Earths atmosphere is made up of a ratio of nitrogen to oxygen. The ratio is 78:21. Assumming constant temp, what is the ratio at 10km. Explain why your result is qualitatively reasonable. (Hint: this problem concerns the number density of oxygen molecules as a function of height. The denisty is related in a simple way to the probability that a given oxygen molecule will be found at a particular height.)

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# Homework Help: Help with a probability question

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