Physics · Thermodynamics
Why does the Moon lack a permanent atmosphere?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The escape velocity on the Moon is infinitely high, preventing gas accumulation.
- 2The root-mean-square velocity of gas molecules is exactly zero due to low temperature.
- 3The root-mean-square velocity of gas molecules is greater than the escape velocity.✓
- 4The root-mean-square velocity of gas molecules is less than the escape velocity.
Correct answer
The root-mean-square velocity of gas molecules is greater than the escape velocity.
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