Question: (a) A wire that is 1.50m long 20 0 C is found to increase its length by 1.9cm when warmed to 420 0 C. Compute

(a) A wire that is 1.50m long 20 0 C is found to increase its length by 1.9cm when warmed to 420 0 C. Compute the average coefficient of linear expansion for its temperature range. (b) Find the stress in the wire if it cooled to 200 C without being allowed to contract. Young's modulus for this wire is 2.0x 1011 Pa.

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