本题目来源于试卷: Physics Unit26: Special Theory of Relativity，类别为 Generic Physics
[单选题]
A spear is thrown by you at a very high spvnp fxln .d3:7eed. As it p6hedyfe)*n rwp32r o t:ckk*-asses, you measure its length at one-half its normal length. From this measurement, you conclude that the k -ty ndrere:3*fc hk) 6owp*2moving 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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Post time 2024-1-14 16:03:04