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A uniform steel wire of cross-sectional ...

A uniform steel wire of cross-sectional area `0.20mm^(2) ` is held fixed by clamping its two ends. If wire is cooled from `100^(@)C` to `0^(@)C` , find
(a) temperature strain
(b) temperature stress
(c) extra force exerted by each clamp on the wire. Young's modulus of steel `=2xx10^(11)N//m^(2)` , coefficient of linear expansion of steel `=1.2xx10^(-5)//^(@)C` .

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