One Source of Sound Is at a and Another

One source of sound is at A and another is at B. The two sources are in phase. The distance AB = 10.0 m. The frequency of the sound waves from both sources is 1000 Hz, and both have the same amplitude. The speed of sound in air is 330 m/s. A receiver is at point C, and AB is perpendicular to AC. The greatest distance AC for which the signal at C is a minimum is

A) 33.0 cm
B) 152 m
C) 330 m
D) 303 m
E) 100 m

Correct Answer:

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