General Physics|CBF209|Aurora College
One of the techniques for determining blood flow in a superficial blood vessel is to measure the frequency change by the Doppler effect of ultrasound. The mean velocity of blood flow in the aorta during systole is 1.5 × 10–2 m / s. What is the change in frequency in an instrument with a signal of frequency 105 Hz? (speed of sound in blood, 1570 m / s).
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