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An ambulance siren emits a 330 Hz tone. It is moving toward you (you are stationary) at 40 m/sec and the air temperature is 20

An ambulance siren emits a 330 Hz tone. It is moving toward you (you are stationary) at 40 m/sec and the air temperature is 20 degrees Celsius. Calculate the frequency you hear as the ambulance approaches you.

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