Knowing that a 0.02in gap exists when the temperature is 75 F, determine {a} the temperature at whirh the normal stress in the aluminum bar will be equal to 11ksi, [b] the corresponding exact length [2 decimal places in 10'3 inches) of'the aluminum bar. Note that: 18.010? is wrong 0.02 in. Bronze Aluminum A = 2.4 m2 A = 28 11:12 E = 15 x 1061351 E = 10.6 x 106 psi a = 12 x 10-5/F a = 12.9 x 10'6fF