A steel bar is connected to an aluminum bar as shown below. At 70 F, the stresses in the steel and the aluminum bars are zero. Calculate the stresses in the steel and in the aluminum when the temperature rises to 120 F. Indicate whether the stresses are tensile or compressive. The properties of the steel and the aluminum are given below. The cross-sectional areas of the steel and the aluminum are the same.

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Pressure and Stress