Answer: Measuring Speed by Radar. A baseball coach uses a
Chapter 37, Problem 37.61(choose chapter or problem)
Measuring Speed by Radar. A baseball coach uses a radar device to measure the speed of an approaching pitched baseball. This device sends out electromagnetic waves with frequency f0 and then measures the shift in frequency f of the waves reflected from the moving baseball. If the fractional frequency shift produced by a baseball is f>f0 = 2.86 * 10-7 , what is the baseballs speed in km>h? (Hint: Are the waves Dopplershifted a second time when reflected off the ball?)
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