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a wire of one...

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a wire of one metre under a certain initial tension emits a sound of fundamental frequency 256 Hz when the tension is increased by 1 kg wt the frequency of the fundamental node increases to 320 Hz. The initial tension is(1) 3/4 kg wt(2)16/9 kg wt () 4/3 kg wt (4) 20/9 kg wt

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