Question: The escape speed from the Earth is 1.12 X 104m/s, so gas molecule travelling away from Earth near the outer boundary of the Earths atmosphere

The escape speed from the Earth is 1.12 X 104m/s, so gas molecule travelling away from Earth near the outer boundary of the Earth’s atmosphere would, at this speed, be able to escape from the Earth’s gravitational field. At what temperature is the average speed of?
(a) Oxygen molecules, and
(b) Helium atoms equal to 1.12 X 104m/s?
(c) Can you see why our atmosphere contains oxygen but not helium?

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