1.有两个小物体,他们之间的万有引力为F,如果保持他们各自的质量不变,将它们之间的距离减小到原来的一半,那么他们之间万有引力的大小等于
人气:108 ℃ 时间:2019-10-19 20:42:53
解答
4F
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