問題詳情
55. The gravitational acceleration at the surface of Earth is g. Another planet has the density of Earth buttwice the radius. What is the gravitational acceleration at the surface of the planet?
(A)8g
(B) 4g
(C) 2g
(D)g
(E) g/4
參考答案
答案：C
難度：計算中-1
書單：沒有書單，新增