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138. The mass of the moon the mass of the earth81and radius ofthe moon=/T)radiusoftheearth.what4is the approximate value of escape velocity for a body onthe surface of the moon, if the escape velocity for earth is11.2 m/s?(a) 1.25 km/s(c) 5 m/s(b) 2.5 m/s(d) 10 m/s

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