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[" A steel rod of cross-sectional area "4cm^(2)" and length "2m],[" shrinks by "0.1cm" as the temperature decreases in night."],[" If the rod is clamped at both ends during the day hours,"],[" find the tension developed in it during night hours."],[" Young modulus of steel "=1*9times10^(11)Nm^(-2)" ."]

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