Internal energy and r.m.s. speed (id: 423e18a4a)

本题目来源于试卷: Internal energy and r.m.s. speed，类别为 美国物理杯赛(Physics Bowl)

[单选题]
04.23: If two molecules nyq 9hr 4-+m l(1 c;0 aqzjmkd-5vjfmnin 0ne b8 :h4hmy yg;)zxba gas collide, then

A. total momentum is always unchanged.
B. velocities are always exchanged
C. both molecules always speed up.
D. total kinetic energy always increases.
E. velocities are always unchanged.


参考答案:  A


本题详细解析: 暂无

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