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The mass of moon is 1 / 81 of earth's mass and its radius is 1 / 4 of that of earth. If the escape velocity from the earth's surface is 11.2 km/s, is value for the moon is
0.14 km/s
0.5 km/s
2.5 km/s
5.0 km/s
Correct Option:
C
N/A
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