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A steel rod, which is free to move, has a length of 200 mm and diameter of 20 mm at a temperature of 15C.

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A steel rod, which is free to move, has a length of 200 mm and diameter of 20 mm at a temperature of 15C. If the rod is heated uniformly to 115C, determine the length and the diameter of this rod to the nearest micron at the new temperature if the linear coefficient of thermal expansion of steel is 12.5 x 10 m/m/C. Is there a stress on the rod at 115C?

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