A solid compound bar (which is made of an aluminum segment and a bronze segment) is fixed to a rigid wall, as shown in the figure. There is a 0.02 in. gap between the left end of the bar and the wall when temperature is 200°F. If the temperature is increased to 300°F, determine: (1) the normal stress developed in the aluminum segment, and (2) the length of the bronze segment. 0.02 in. L=10 in. L=20 in. Bronze Aluminum Bronze Aluminum Note: length (L), cross sectional area (4) and Young's modulus (E) and linear coefficient of thermal expansion (a) of the two segments are given in the figure, respectively. A = 4 in? E = 25x10 psi a = 10x106 /°F A = 6 in? E = 15x10° psi a = 20x10 /°F %3D