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[" A source and an observer are approaching one another with the relative velocits "40ms^(-1)" .If the "],[" true source frequency is "1200Hz" ,deduce the observed frequency under the following "],[" conditions: "],[" (1) All velocity is in the source alone."],[" (ii) All velocity is in the observer alone."],[" (in) The source moves in air at "100ms^(-1)" towards the observer,but the observer also moves "],[" with the velocity "v_(0)" in the same direction."]

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A source and observer are approaching one another with the relative velocity 40ms^(-1) . If the true source frequency is 1200 Hz, deduce the observed frequency under the following conditions: (i) All velocity is in the source alone. (ii) All velocity is in the observer alone. (iii) The source moves in air at 100ms^(-1) towards the observer, but the observed also moves with the velocity v_(0) in the same direction. (Velocity of sound 340 m/s)

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