Answered: A sound source A and a reflecting…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter17: Physics Of Hearing

Section: Chapter Questions

Problem 31PE: (a) At an air show a jet flies directly toward the stands at a speed of 1200 km/h, emitting a...

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Question

A sound source A and a reflecting surface B move directly
toward each other. Relative to the air, the speed of source A is
29.9 m/s, the speed of surface B is 65.8 m/s, and the speed of sound
is 329 m/s. The source emits waves at frequency 1200 Hz as measured
in the source frame. In the reflector frame, what are the
(a) frequency and (b) wavelength of the arriving sound waves? In
the source frame, what are the (c) frequency and (d) wavelength of
the sound waves reflected back to the source?

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