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Two speakers generate harmonic sound waves that are in phase at 686 Hz. The speakers face...

Two speakers generate harmonic sound waves that are in phase at 686 Hz. The speakers face the same direction. The speed of sound is 343 m/s. Find the phase difference between the two waves received at the following locations.

(a) 4.80 m from each speaker
rad

(b) 2.42 m from one speaker and 3.72 m from the other
rad

(c) 2.42 m from one speaker and 4.80 m from the other
rad

(d) 2.42 m from one speaker and 3.37 m from the other

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