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A steel rod with a cross-sectional area of 150 mm2 is stretched between two fixed points. The tensile load at 20C is 5000 N. What

A steel rod with a cross-sectional area of 150 mm2 is stretched between

two fixed points. The tensile load at 20C is 5000 N. What will be the stress at 20C ? At what temperature will the stress be zero? Assume = 11.7 m/(m . C), and E = 200 GPa

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