A bat emits an ultrasonic pulse by a frequency of 440 khz
A bat emits an ultrasonic pulse by a frequency of 44.0 kHz. It senses a moth flying by and `measures' a time delay of 7.30 ms. How far away the moth is?
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an acoustic signal is composed of the first three harmonics of a wave of fundamental frequency 470 hz if these
a bat emits an ultrasonic pulse by a frequency of 440 khz it senses a moth flying by and measures a time delay of 730
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