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A steel rod of length 1m is heated from 20 o C to 250 o C and is then rigidly clamped at both ends and

A steel rod of length 1m is heated from 20^oC to 250^oC and is then rigidly clamped at both ends and allowed to cool. If the tensile strength, coefficient of linear thermal expansion and Young's modulus of steel are 150 MN/m², 12x10^-6/K and 200GN/m² respectively, calculate:

a) the breaking strain

b) the change in length at the breaking strain

c) the temperature at which the rod will fail

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