本题目来源于试卷: .Gravity..，类别为 美国物理杯赛(Physics Bowl)
[单选题]
99.21: What happens to the force of gravita2 yoq)1 uu/r d)yv f3y.c9iceitional 9im(p b1t n(m;k:ivmvattraction between two small objects if the mass of each object is doubled and the distance ( mvk i btm9:im1p(;vnbetween their centers is doubled?
A. It is doubled
B. It is quadrupled
C. It is halved
D. It is reduced fourfold
E. It remains the same
参考答案: E
本题详细解析:
暂无
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