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Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are ...

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Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are ...

Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are separated by a distance of 5.00 m. A person is standing 12.0 m away from the wall, equidistant from the loudspeakers. When the person moves 1.00 m parallel to the wall, she hears no sound (experiences destructive interference) for the first time. What is the frequency of the sound? The speed of sound in air is 343 m/s.
A) 211 Hz
B) 256 Hz
C) 422 Hz
D) 512 Hz
E) 674 Hz

Textbook

College Physics

Edition: 1^st

Authors: Etkina, Gentile, Van Heuvelen

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