A bat emits a sound at a frequency of 30.0 kHz as it approaches a wall. The bat detects beats such that the frequency of the echo is 900 Hz higher than the frequency the bat is emitting. What is the speed of the bat? The speed of sound in air is 340 m/s.
A)20.0 m/s
B)15.0 m/s
C)10.0 m/s
D)30.0 m/s
E)5.0 m/s

Question

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The Answer of A bat emits a sound at a frequency of 30.0 kHz as it approaches a wall. The bat detects beats such that the frequency of the echo is 900 Hz higher than the frequency the bat is emitting. What is the speed of the bat? The speed of sound in air is 340 m/s.
A)20.0 m/s
B)15.0 m/s
C)10.0 m/s
D)30.0 m/s
E)5.0 m/s

A Bat Emits a Sound at a Frequency of 30