The Moon has been unable to hold any atmosphere because:
A) it has a low escape velocity.
B) it cooled very slowly during its formation.
C) its orbital velocity is higher than its escape velocity.
D) its gravitational acceleration is more than 10 m/s2.
A
You might also like to view...
All elliptical galaxies are more massive than the largest spiral galaxies
a. True b. False Indicate whether the statement is true or false
The top quark
a. is the only quark not yet detected experimentally. b. has been shown not to exist. c. was discovered at Fermilab. d. none of the above
Binding energy per nucleon in a nucleus is
A. the same for all nuclei. B. the greatest for the largest nuclei. C. the greatest for the smallest nuclei. D. the greatest for medium-sized nuclei.
The "green revolution" appeared to allow the Malthusian vision of widespread famine to be conquered forever
What will be an ideal response?