A college student is at a concert and really wants to hear the music, so she sits between two in-phase loudspeakers, which point toward each other and are 50.0 m apart. The speakers emit sound at a frequency of 490. Hz. At the midpoint between the speakers, there will be constructive interference, and the music will be at its loudest. At what distance closest to the midpoint could she also sit to experience the loudest sound?
16.34.A string of a violin produces 2 beats per second when sounded along with a standard fork of frequency 400. Hz. The beat frequency increases when the string is tightened.
a) What was the frequency of the violin at first?
b) What should be done to tune the violin?
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