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 ultrasonbxgpbj ah8d93( : ,fi-l3y2kkfoe0 yoic sound waves at 50.0 kHa mba k/j3wib 1-nh/y:z and receives them returned from an object moving directly away from it at 25 m/s What is the receive1ai ybhkjw bm-:n /a/3d sound frequency?    $ \times10^{ 4}$ Hz

参考答案: 4.32±2%


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