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    Speed of Blood

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    If the velocity of blood flow in the aorta is normally about 0.32 m/s, what beat frequency (in units of kHz) would you expect if 5.35 MHz ultrasound waves were directed along the flow and reflected from the red blood cells? Assume that the waves travel with a speed of 1.54 x 10^3 m/s.

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    Solution Preview

    Apply the Doppler effect.

    The reflected waves are treated as coming from the source (the red blood cells), which is moving in the direction opposite that of the reflected waves.

    The apparent wavelength due to the ...

    Solution Summary

    The solution shows how to use Doppler's effect to study the speed of blood in the human body.