本题目来源于试卷: Doppler Effect，类别为 美国物理杯赛(Physics Bowl)
[单选题]
98.18: When a train e0;z/7ijf/vrk 9ie qnw/y qj3i1 jmkz/mj5 x;:qd,9wjiu* zm bs at rest, both a passenger on the train and a ticket seller on the station agree that the trains whistle produces sound at a frequency of 120 Hz. When the train is moving away from the station at 15 m/s, the passengedx jmz:z5jwj/1mkbq 9u;m*,ir hears a frequency of _____ Hz and the ticket seller hears a frequency of ____ Hz.
A. 120, 125
B. 115, 120
C. 120, 120
D. 115, 115
E. 120, 115
参考答案: E
本题详细解析:
暂无
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