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Answer any one question :A steel wire of length 64 cm weights 5g. If it is stretched by force of8N, what should be the speed of a transverse wave passing on it ?(Ans. 3.19x102 m/s )Two trains are travelling towards each other both at a speed of 90km/h. If one of the trains sounds a whistle at 500 Hz, what will bethe apparent frequency heard in the other train ? Speed of sound inair = 350 m/s. (Ans. 576.92 Hz)albeAnnonction

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