gc textbook chapter 12 Sound (id: dbf38014a)

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]
The Doppler effect using ultrasonic waves of frequen brxg1 zp5y1,y;:hr 2 smbrp)zvpbem+3o7:yzcy $2.25 \times10^{ 6}$Hz is used to monitor the heartbeat of a fetus. A (maximum) beat frequency of 500 Hz is observed. Assuming that the speed of sound in tissue is $1.54 \times10^{3 }$ m/s calculate the maximum velocity of the surface of the beating heart.    m/s

参考答案: 0.171±2%


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