Knowing a .02 in gap exists when the temperature is 75 degrees F, determine(a) the temperature at which the normal stress in the aluminum bar will be equal to -11ksi, (b) the corresponding exact length of the aluminum bar.
Bronze Aluminum
A = 2.4 in^2 A=2.8 in^2
E=15x10^6 psi E=10.6x10^6
alph=12x10^-6/F alpha=12.9x^-6/F
L=14in L=18in