An ambulance emits a 400 hz sound while standing at the
An ambulance emits a 400 Hz sound while standing at the fire station. A passenger in a car detects a frequency of 420 Hz while approaching the fire station. What is the speed of the passenger's car?
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an ambulance emits a 400 hz sound while standing at the fire station a passenger in a car detects a frequency of 420 hz
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