QUESTION 15 A bimetallic bar is made of two equal length steel and brass bars of same width firmly bonded together. The cross-sectional area of the brass bar is twice that of the steel bar. The Young's modulus of steel is twice that of brass. The coefficient of linear expansion of brass is twice that of steel. When the compound bar is subjected to a temperature rise of 50°C, what is the ratio of stress generated in steel to stress generated in brass? Note: Please study lecture slides and tutorial problem on thermal stress - strain O a. 1: (-2) O b. 1:(-1) O c. 2:(-1) O d. 4:(-1) QUESTION 16

Parvinbhai

Please solve it asap !! Strictly don't use Artificial intelligence tools.

Question 3 (a) One end of a wire of length L and diameter d is attached to a high ceiling. The wire hangs vertically under its own weight. Under these conditions: (i) Calculate the highest stress in the wire (ii) Calculate the elongation of the wire (b) If the wire is now laying horizontally on a smooth surface and attached to a wall at one end, what force must be applied to the other end of the wire for the elongation to be the same as in part (a). Assume the following properties for the wire: E=29 x 10° psi, d=0.50 in, L=60 ft and specific weight of y=0.284 1b/in³.