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Two sources of sound are moving in oppos...

Two sources of sound are moving in opposite directions with velocities `V_(1)` and `V_(2)(V_(1) gt V_(2))`. Both are moving away from a stationary observer. The frequency of both the source is 1700Hz. What is the value of `(V_(1)-V_(2))` so that the beat frequency observed by the observer is 10Hz. `V_("sound")=340m//s` and assume that `V_(1)` and `V_(2)` both are very much less than `V_("sound")`.

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