A steel rod ? 7860 kgm3 has a length of 2.19 m. it is, Ask an Expert

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A steel rod (? = 7860 kg/m3) has a length of 2.19 m. It is bolted at both ends between immobile supports. Initially there is no tension in the rod, because the rod just fits between the supports. Find the tension that develops when the rod loses 3470 J of heat.

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