answer question 5

April 26, 2023 Quiz in Engineering 33 Succinctly answer the questions. Provide complete solution to problems. 1. Explain why a brass lid ring on a glass canning jar will loosen when heated. 2. The thermal conductivity of a single-crystal ceramic specimen is slightly greater than polycrystalline one of the same material. Why is this so? 3. Rods of copper, brass, aluminum, and steel are welded together to form an X-shaped figure. Assum that the cross sectional area of each rod is the same. The end of the copper rod is maintained 120C. The end of the aluminum rod is at 100C and the ends of steel and brass rods are at 0C. Th lengths and thermal conductivities of the rods are: Copper: L=50cmk=0.92cal/scmC Brass: L=25cmk=0.26 Aluminum: L=60cmk=0.49 Steel : L=15cmk=0.12 4. A copper wire 1.5m long is cooled from 40 to 9C. How much change in length will it exp Calculate the temperature at the junction. 5. For a brass alloy, the stress at which plastic deformation begins is 345MPa and the mol if =17.0 a. What is the maximum load that may be applied to a specimen with cross-section elasticity is 103GPa. 130mm2 without plastic deformation? b. If the original specimen length is 76mm, what