An adiabatic open feedwater heater in an electric power plant mixes 0.2 kg/s of steam at 100 kpa and 160°c with 8.5 kg/s of feedwater at 100 kpa and 50°c to produce feedwater at 100 kpa and 60°c at the outlet. determine the outlet mass flow rate and the outlet velocity when the outlet pipe diameter is 0.03 m. the specific volume at the exit is 0.001017 m3/kg.

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

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 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?