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Two point sound sources A and B each to ...

Two point sound sources `A` and `B` each to power `25pi w` and frequency `850 Hz` are `1 m` apart. The sources are in phase

(a) Determine the phase difference between the waves emitting from `A` and `B` received by detector `D` as shown in figure.
(b) Also determine the intensity of the resultant sound wave as recorded by detector `D`. Velocity of sound `= 340 m//s`.

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