Two loudspeakers 42.0 m apart and facing each other emit identical 115 Hz sinusoidal sound waves in a room where the sound speed is 345 m/s. Susan is walking along a line between the speakers. As she walks, she finds herself moving through loud and quiet spots. If Susan stands 19.5 m from one speaker, is she standing at a quiet spot or a loud spot?

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Two loudspeakers 42.0 m apart and facing each other emit identical 115 Hz sinusoidal sound
waves in a room where the sound speed is 345 m/s. Susan is walking along a line between
the speakers. As she walks, she finds herself moving through loud and quiet spots. If Susan
stands 19.5 m from one speaker, is she standing at a quiet spot or a loud spot?
Transcribed Image Text:Two loudspeakers 42.0 m apart and facing each other emit identical 115 Hz sinusoidal sound waves in a room where the sound speed is 345 m/s. Susan is walking along a line between the speakers. As she walks, she finds herself moving through loud and quiet spots. If Susan stands 19.5 m from one speaker, is she standing at a quiet spot or a loud spot?
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