Dr. Ben Blalock has hired us to determine the length of the power lines between two towers, and the tension in the power line. We do this by sending a longitudinal pulse and then a transverse pulse down the line. It takes 0.17 sec for the longitudinal pulse to return, and 7.6 sec for the transverse pulse to return. The power lines are made of 1.0 inch diameter aluminum wire, with E=10.3x106 psi and weighing 172 lb/ft3.

a.) What is the length of the power line?

ANSWER: 1416 ft

b.) What is the tension in the power line?

To design a steam turbine to produce 12,000 hp power. a engineer comsiders using a steady state stean low st 1160fr and engineer considers using a steady state steam flow at 1160°r and 450 psia to drive this steam turbine. the exhaust of the steam is cooled by the lake (vacuum). heat losing to the surroundings is measured at a rate of 555.55 btu/s. (a) sketch the system with the given conditions. (b) neglecting kinetic and potential energy changes from inlet to exit, determine the volumetric flow rate of the steam at the inlet, (ft'/hr). must clearly show unit conversions at crtical terms.