Multiple Choice
A police car siren emits a sound at 600 Hz.If an observer moves toward the source at 50 km/hr and hears a siren frequency of 678 Hz,calculate the speed of the police car and whether it is approaching or receding from the observer (assume the speed of sound in air = 343 m/s) .
A) 99.0 km/hr receding
B) 144 km/hr approaching
C) 99.0 km/hr approaching
D) 144 km/hr receding
E) not possible for any reasonable police car speed
Correct Answer:
Verified
Correct Answer:
Verified
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