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A brass rod of cross-sectional area 1cm^...

A brass rod of cross-sectional area `1cm^(2)` and length 0.2 m is compressed lengthwise by a weight of 5 kg. if young's modulus of elasticity of brass is `1xx10^(11)N//m^(2)` and `g=10m//sec^(2)` then increase in the energy of the rod will be

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The correct Answer is:
`2.4 xx 10^(-5)J`.
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