A tuning fork of frequency 400 Hz is moved away from a stationary observer and toward a flat wall in a positive direction with a speed of 2.0 m.s–1. Assume the speed of sound in air to be 340 m.s–1. a) Determine the apparent frequency of the unreflected sound waves coming directly to the observer. b) Determine the apparent frequency of the sound waves coming to the observer after reflection from a flat wall.

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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A tuning fork of frequency 400 Hz is moved away from a stationary observer and
toward a flat wall in a positive direction with a speed of 2.0 m.s–1. Assume the speed
of sound in air to be 340 m.s–1.
a) Determine the apparent frequency of the unreflected sound waves coming
directly to the observer.
b) Determine the apparent frequency of the sound waves coming to the observer
after reflection from a flat wall.

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