本题目来源于试卷: Momentum and Energy，类别为 美国物理杯赛(Physics Bowl)
[单选题]
15.49: The kinetic energy ekp 3ucka7 k /47g+brmassociated with an electron is twice its rest energy.-/*vf;2np amty 6kdwc3c4yxm At what speed is the electron trm- f/6yynm 2 d3c4v w*pakx;ctaveling(in unit of m/s)?
A. $2.83\times\:10^8$
B. $2.67\times\:10^8$
C. $2.60\times\:10^8$
D. $2.25\times\:10^8$
E. $2.12\times\:10^8$
参考答案: A
本题详细解析:
暂无
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