Physics Unit12: Sound (id: e754478c3)

本题目来源于试卷: Physics Unit12: Sound，类别为 通用国际物理

[单选题]
An observer approaches a sr:i*qt6.0u7 xoxtcwe tationaryjqo(p i66n//uvit ho3. yles- 1000-Hz sound source at twice the speed of sound. The observer hears a. (io/uyh6esl6 o3/vnp tj iq- frequency of

A. 4000 Hz.
B. 2000 Hz.
C. 500 Hz.
D. none of the above


参考答案:  D


本题详细解析: 暂无

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