1.A high-strength steel simply supported W24 X 76 beam carries a uniformly distributed load over its entire length of 25 ft. (a) If the allowable stress is 33 ksi, what may be the value of the load, in addition to the beam's own weight? (b) what is the maximum deflection of the beam under the load?
2.A 30ft long steel rod of circular cross section is used at construction site. the tensile load on the rod will be 20kips. the maximum elongation allowed is to be 1/4". allowable tensile stress is 24 ksi. select the appropriate diameter of the rod for the construction.
3.Two parallel plates are separate at a distance of 2mm by a fluid. If a shearing stress of 150 Pa is developed at the upper plate when it is pulled at a velocity of 1m/s. Determine the viscosity of the fluid.
4.Assume that installing a solar array for on-site energy generation costs $50,000 now. How much needs to be saved on annual energy bills to recover the cost of the system in 5 years? Assume an annual interest rate of 7 percent.