An Observer Stands 3 M from Speaker a and 4

question 4

Multiple Choice

An observer stands 3 m from speaker A and 4 m from speaker B. Both speakers, oscillating in phase, produce 170-Hz waves. The speed of sound in air is 340 m/s. What is the phase difference (in radians) between the waves from A and B at the observer's location, point P? ​ ​

• A)0
• C)π
• D)2π
• E)4π