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Extracted text: The C83400-red-brass rod AB and 2014-T6- aluminum rod BC are joined at the collar B and fixed connected at their ends If there is no load in the members when T = 50'F, determine the average normal stress in each member when T2= 120°F Also, how far will the collar be displaced? The cross-sectional area of each member is 1 75 in?. 3 t 2 ft