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Standing at a crosswalk, you hear a frequency of 540 hz from the siren of an approaching ambulance. after the ambulance passes, the observed frequency of the siren is 446 hz. determine the ambulance's speed from these observations. (take the speed of sound to be 343 m/s.)
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Standing at a crosswalk, you hear a frequency of 540 hz from the siren of an approaching ambulance....
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