本题目来源于试卷: Physics Unit26: Special Theory of Relativity，类别为 国际高中通用物理
[单选题]
A spear is thrown by you at a very high speed. As it pas*yfvs b op(+ 9g5nzb pv6(buk7ses, you measurxh0gdw-t( 6p 41eqopg e its length at one-half its normal lengtx4gpt1eqdw0ph6-go (h. From this measurement, you conclude that the moving spear's mass must be
A. one-half its rest mass.
B. twice its rest mass.
C. four times its rest mass.
D. none of the given answers
参考答案: B
本题详细解析:
暂无
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