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The Doppler shift of ultrasonic waves can measure the speed of blood in an arter...
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The Doppler shift of ultrasonic waves can measure the speed of blood in an artery. If the frequency of the stationary source is 105 kHz and the reflected sound has a Doppler shift of 180 Hz, what is the blood flow speed? (The speed of sound inside the body is 1 500 m/s.)
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