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1. [2 pts] Gases will escape a planet's atmosphere if the mean speed of the gas...

1. [2 pts] Gases will escape a planet's atmosphere if the mean speed of the gas particle exceeds about 1/6 the planet's escape speed. Suppose one wants to make Mars habitable by releasing molecular oxygen (O2) into the atmosphere. Can O2 be retained in Mars' atmosphere over billions of years? Express all speeds in km/sec.

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