APFIVE Doppler Effect With Reflection
A bat emits ultrasonic waves at 50 kHz while flying at 8 m/s toward a wall. The waves reflect off the wall and return to the bat. If the speed of sound is 340 m/s, what frequency does the bat detect in the returning echo?
A
54.8 kHz
B
52.4 kHz
C
51.2 kHz
D
50 kHz
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