APFIVE Doppler Effect For Reflected Sound Waves
A bat emits ultrasonic waves at 50 kHz and flies at 8 m/s toward a wall. If the speed of sound in air is 340 m/s, what frequency of the reflected echo does the bat detect?
A
51.2 kHz
B
50.9 kHz
C
52.4 kHz
D
54.8 kHz
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