gc textbook chapter 12 Sound (id: 9bc8708c8)

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

[填空题]
A bat at rest sends out ul(/e r.uee:8px:yf wj.pn9e extrasonic sound5dy 5 /rxyu3ht37pgr n waves at 50.0 kHz and receives them returned from an object movrn /dry3gu5xp5y t73hing directly away from it at 25 m/s What is the received sound frequency?    $ \times10^{ 4}$ Hz

参考答案: 4.32±2%


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