Problem 1 (25 pts.) 39 f+ (a) (b Given: A steel railroad track which was installed at 30 F. Let E = 29 x 10 ^6 psi & a = 6.5 x 10^-6 / . F Find: If the temperature reaches 125 . F, determine a) The normal stress in the rails which are welded together to form a continuous track. b) The normal stress in the rails assuming the rails are 39 ft. long with 1/4" gap between them