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An ambulance with a siren emitting a whine at 1630 Hz overtakes and passes a cyclist pedaling a bike at 2.31 m/s. After being passed,

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An ambulance with a siren emitting a whine at 1630 Hz overtakes and passes a cyclist pedaling a bike at 2.31 m/s. After being passed, the cyclist hears a frequency of 1621 Hz. How fast is the ambulance moving? (Take the speed of sound in air to be 343 m/s.) Number i Units

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