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. A . ezxk8n5nia*s it passes, you measurfm4 f8b 2d75-n vrrbtge its length at one-half its normal length. From this m b2 n- f4rvg58fmtr7bdeasurement, 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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