本题目来源于试卷: Physics Unit26: Special Theory of Relativity，类别为 通用国际物理
[单选题]
A spear is thrown by yot i+dwqnqw3(r o: htfgb8 v2-4u at a very high speed. As it pass7 41qx p8ps(uc/-)mc.xi4iswoswdmz es, you measure its length i- zqswop8s4 m ( 4ui)xcp7wd.s1x/m cat one-half its normal length. 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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