問題詳情

25.A planet has mass one-half the mass of the earth. What radius must it have so that theacceleration due to gravity at its surface is the same as the acceleration due to gravity at thesurface of the earth? (Answers are expressed in terms of the radius of the earth.)
(A) R = 1.41 RE
(B) R = 0.71 RE
(C) R = 2.00 RE 
(D) R = 0.50 RE

參考答案

答案:B
難度:非常困難0
統計:A(1),B(0),C(0),D(0),E(0)

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