- #1

alwayslearnin

- 1

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fr =

f

x

(1 + v/u) / (1 − v/u)

The reflected sound interferes with the emitted sound, producing beats. If the speed of red blood cells is 0.12 m/s, the ultrasound frequency used is 4.3 MHz, and the speed of sound in blood is 1570 m/s, what is the beat frequency?

____ Hz

I try to put it in the equation I got it wrong and my previous answers were wrong too:

2.45 4.34 and 329