Two loudspeakers are placed 3.00 m apart, as shown in the figure below. They emit 494-Hz sounds, in phase. A microphone is placed 3.20 m distant from a point midway between the two speakers, where an intensity maximum is recorded.
A) How far must the microphone be moved to the right to find the first intensity minimum?
B) Suppose the speakers are reconnected so that the 494-Hz sounds they emit are exactly out of phase. At what positions are the intensity maximum and minimum now?
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