A 1-meter long copper bar is placed between two rigid, unyielding walls, shown below, with only one end attached. Calculate the stress developed in the bar due to a temperature rise of 59C. Use E= 103500 MPa and a=0.0000160 per 1 degree C. 0.5 mm L= 1 m 33.51 MPa 34.51 MPa 45.95 MPa 48.27 MPa Q#3a.: A 2.2-inch diameter AISI 1020 steel rod is 14 feet long. Under an applied load, the rod elongates by 0.50 inch. Compute the axial (longitudinal) strain in the bar. O 0.00121 0.00331 0.00298 0 0.01601 A main cable in a large bridge is designed for a tensile force of 2,600,000 lb. The cable consists of 1570 parallel wires, each 0.15 inch in diameter. The wires are cold-drawn steel with an average ultimate strength of 230,000 psi. What factor of safety was used in the design of the cable? 2.45 2.61 2.80 2.91 A main cable in a large bridge is designed for a tensile force of 2,600,000 lb. The cable consists of 1570 parallel wires, each 0.15 inch in diameter. The wires are cold-drawn steel with an average ultimate strength of 230,000 psi. What factor of safety was used in the design of the cable? 2.45 2.61 2.80 2.91