Two circular rods, both of length L and having the same diameter, are placed end to end between rigid supports with no initial stress in the rods. The coefficient of linear expansion and Young's modulus for rod A are a and Y respectively; those for rod B are ab and YB respectively. Both rods are "normal" materials with a > 0. The temperature of the rods is now raised by AT. Correct The length of the combined rod remains the same, but because the rods have different e individual rods change. In other words, ALA +ALB O even though ALA = 0 and = Part B After the rods have been heated, which of the following statements is true? Choose the best answer. The stress in each rod remains zero. A compressive stress arises that is the same for both rods. A compressive stress arises that is different for the two rods. A tensile stress arises that is the same for both rods. A tensile stress arises that is different for the two rods. A compressive stress arises in one rod and a tensile stress arises in the other rod.