Steam enters a turbine at 35 m/s and specific enthalpy of 3500 kJ/kg. The steam leaves the turbine as a mixture of vapor and liquid having a velocity of 50 m/s and a specific enthalpy of 2500 kJ/kg. If the flow through the turbine is steady, adiabatic, and changes in elevation are negligible, calculate the work output per unit mass (kJ/kg) for the turbine.

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

Acompound machine is also called a machine. a. force b. simple c. complex d. directional