Answer to Question #117018 in Mechanics | Relativity for Clara

Question #117018
A car horn has a frequency of 3500Hz. An observer hears the car horn approaching with a frequency of 3750Hz. Calculate the speed of the car in m/s. The speed of sound in the air is 343m/s.
1
Expert's answer
2020-05-20T09:27:26-0400


 The observer detects waves with a frequency f given by


"\\nu=\\nu_0\\frac{s}{s-u}\\to u=\\frac{\\nu-\\nu_0}{\\nu}s=\\frac{3750-3500}{3750}\\cdot343=22.87m\/s"










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