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b) (5 pts) A police car uses a siren of 600 Hz. You measure the frequency to be 648.6 Hz when the car approaches towards you.
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Given, fa 600 Hz f = 648.6 Hz V=343 mls at 20°C Vs = Velocity of car f f vo vo V-vs z) 648.6 = 600 34 3 343-V -) Vs= 25.70

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