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Example 12 A steel wire of uniform cross-section of1 mm2 is heated to 70° C and stretched by tying its two endsrigidly. Calculate the change in the tension of the wire whenthe temperature falls from 70°C to 3Cofficient of linearexpansion of steel is 1.1x 10 °C and the Young'smodulus is 2.0x 1011 Nm-250 c-1 |
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