An ultrasonic wave is sent into a patient and reflected back…
An ultrasonic wave is sent into a patient and reflected back to the source by the moving wall of the heart. The wall of the heart is moving at 0.10 m/s straight away from the source. The original frequency is 308,000 Hz, and the speed of ultrasound in tissue is 1540 m/s. DF 5.1.jpg
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