A steel rail for railroad track is 10 m long. Determine the stress in the rail if it was completely restrained from expanding. Let E = 210 GPa and = 12 x 10-6/C. The temperature changes from 20 C to 35 C. Select the correct response: 37.8 MPa 46.4 MPa 23.8 MPa 18.9 MPa

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