A bar 4 ft long is set snugly between two rigid walls when the temperature is 50deg.F. What is the stress in the bar when the temperature is 90deg.F? Use E = 17 x10^6 psi, coef. of thermal expansion = 9.3 x10^-6 per deg.F  a. 6520 psi b. 6324 psi c. 6156 psi d. 6572 psi

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Pressure and Stress