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Physics, 07.10.2019 18:00 brainguy124
Ablood-flow meter emits a 1.5-mhz ultrasound pulse to measure the speed of blood moving directly away from the meter. the meter sensor detects the pulse reflected back from the blood at a frequency 28 hz lower than the emitted frequency. take the speed of sound in the tissues to be 1475 m/s
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