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If a rod of 1025 steel of 0.5 m long is heated from 20 to 80^OC (293 to 353K) while its ends are maintained rigid

(i)Determine the type and magnitude of stress that develops. Assume that at 20^OC the rod is stress free.

(ii)What will be the stress magnitude if a rod 1 m long is used?

(iii)If the rod in Q4(i) is now cooled from 20 to -10^OC (293 to 263K), estimate the magnitude of stress

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