An adiabatic air compressor is to be powered by a direct-coupled adiabatic steam turbine that is also driving a generator. steam enters the turbine at 12.5 mpa and 500°c at a rate of 25 kg/s and exits at 10 kpa and a quality of 0.92. air enters the compressor at 98 kpa and 295 k at a rate of 10 kg/s and exits at 1 mpa and 620 k. determine (a) the net power delivered to the generator by the turbine, (b) the rate of entropy generation within the turbine and the compressor during this process, and (c) the isentropic efficiencies of the compressor and the turbine. solve this problem using variable specific heats (exact treatment).

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Ais not a compound machine. a. bolt b. shovel c. handcart (dolly) d. see-saw (teeter totter)

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?