Multiple Choice
What relationship must exist between a certain molecule's average speed, v, in a planetary atmosphere and the escape velocity, Vesc, from the planet's surface for this particular molecular species to be retained by the planet?
A) v should not exceed Vesc.
B) v must be less than about 6 × Vesc.
C) v must be less than about 1/6 Vesc.
D) v should not exceed 2 × Vesc.
Correct Answer:
Verified
Correct Answer:
Verified
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