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A plumber exerts the two forces shown to loosen a pipe. (a) What total moment does he exert about the axis of the pipe? (b) If you represent the two forces by a force acting at and a couple , what are and ? (c) If you represent the two forces by a wrench consisting of the force and a parallel couple , what is , and where does the line of action of intersect the plane?
A recently hired CEO (chief executive officer) wants to reduce future production costs to improve the company’s earnings, thereby increasing the value of the company’s stock. The plan is to invest $70,000 now and$50,000 in each of the next 2 years to improve productivity. By how much must annual costs decrease in years 3 through 10 to recover the investment plus a return of 15% per year?
Air enters a turbine at =0.4, , and =625 kPa (abs). Conditions leaving the turbine are =0.8, , and =20 kPa (abs). Evaluate local isentropic stagnation conditions (a) at the turbine inlet and (b) at the turbine outlet. Calculate the change in specific entropy across the turbine. Plot static and stagnation state points on a Ts diagram.