Calculate the total deformation in a 25ft long, 4 in. diameter steel bar hanger that supports a 390 kip load. This bar is also subjected to a change in temperature from 140°F before loading to -10°F after loading, calculate the total change in length due to the combined thermal and mechanical. (Esteel 30 x 10 psi, and a = 0.0000065 in/in °F)

consider a cylindrical nickle wire 1.9 mm in diameter and 3.0*104 mm long. calculate its elongation when a load of 260 N is applied. Asuume that the deformation is totally elastic and that the eleastic modulus for nickel is 207 GPa (or 207* 109 N/m2)

Suppose a steel strut having a cross-sectional area of 7.00 x 10-4 m2 and length 2.20 m is bolted between two rigid bulkheads in the engine room of a submarine. Assume the density of steel is the same as that of iron (7.86 x 103 kg/m3).   (a) Calculate the change in temperature of the strut if it absorbs an energy of 3.00 x 105 J of thermal energy. (b) Calculate the compressional stress in the strut.

A copper rod 6cm in diameter is placed within a steel tube, 8cm external diameter and 6cm internal diameter, of exactly the same length. The two pieces are rigidly fixed together by two transverse pins 20mm in diameter,one at each end passing through both rod and the tube. Calculate the stresses induced in the copper rod, steel tube and the pins if the temperature of the combination is raised by 50°C, take: E,= 210 GPa and a,= 0.0000115 per deg C. E= 105 GPa and a,= 0.000017 per deg C. Calculate the stresses induced in the copper rod. steel tube. Calculate the stresses induced in the pins if the temperature of the combination is raised by 50°C,