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 speem m z0c;ipd) x0sqq9e*f0 .axpd. As it passes, you measure itsq0 r6u03qiqk-eez( r)v np /bx length at3 )u- ibre6n0 q/ qpkeqxvr(z0 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
| 
