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2. An ambulance has just passed by your home. You detect that the frequency of th receding siren is 900.0 H z. If you know

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2. An ambulance has just passed by your home. You detect that the frequency of th receding siren is 900.0 H z. If you know that the frequency of the ambulance's sit is 950.0 Hz, how fast is the ambulance moving ? The speed of sound in this case 335 m/s. m [ans: 18.6 m/s]

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