gc textbook chapter 12 Sound (id: 1f29027b2)

本题目来源于试卷: gc textbook chapter 12 Sound，类别为 通用国际物理

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A bat flies toward a wallyt u9u(g52esw )jfi2q op kc4; j2h3zam u( fm(at a speed of 5 m/s As it flies, the bat emits an ultrasonic sound wave with frequency 30.0 kHz. What frequency does th(mfjmh32u z a(e bat hear in the reflected wave?    $ \times10^{4}$ Hz

参考答案: 3,09±2%


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