What per cent of length of wire increases by applying a stress of \( 1 \mathrm{~kg} \) weight \(...

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What per cent of length of wire increases by applying a stress of \( 1 \mathrm{~kg} \) weight \( / \mathrm{mm}^{2} \) on it?
\( \left(\mathrm{Y}=1 \times 10^{11} \mathrm{~N} / \mathrm{m}^{2}\right. \) and \( 1 \mathrm{~kg} \) weight \( =9.8 \) newton \( ) \)
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