A car sounding its horn (rated by the manufacturer at 600 Hz) is moving at 15.0 m/s toward the east. A stationary observer is standing due east of the oncoming car.
1) What frequency will he hear assuming that the speed of sound is 343 m/s? (Express your answer to two significant figures.)
2) What if the observer is standing due west of the car as it drives away? (Express your answer to two significant figures.)
fd=f*(v+vr)/(v-vs).
receiver is moving towards the source: (v+vr).
receiver is moving away from the source: (v-vr).
source is moving towards the receiver: (v-vs).
source is moving away from the receiver: (v+vs).
(a) source is moving towards the receiver: (v-vs)
fd=f*(v+vr)/(v-vs) ,vr=0
fd= 600*343/(343-15)
fd= 627.43 [Hz].
(b) source is moving away from the receiver: (v+vs)
fd=f*(v+vr)/(v+vs) ,vr=0
fd= 600*343/(343+15)
fd= 574.86 [Hz].
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