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The two piper shown are welded together at B and supported by rigid wall at A and C \alpha_{\text {Aluminum }}=13 \times 10^{-6} \text {in/in } / F \text {

and of steel }=6.6 \times 10^{-6} \text {in } / \text { in } / \mathrm{OF} \text { . } A AL =1.131 IN 2 , AST = 0.6 IN 2 , EA L = 10*10 6 PSI EST = 30*10 6psi Est = 30 x 106 Ps i if only the steel pipe was heated from 70f to 150 f while the aluminum remained at 70 f ( was not heat) 1.Calculate the reactions at walls at A and c (2) Calculate the displacement of point B due to the increase in the steel temperature.

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