Water contained in a closed, rigid tank, initially saturated vapor at 200°C, is cooled to 100°C.

a) Determine the initial and final pressures, each in bar.

b) Locate in sketches in a p–v diagram and aT–v diagram the initial and final states relative to the vapor dome.

For the initial and final state, determine

c) in percent the mass fraction of the vapor vs. the total mass of the water in the tank,

d) in percent the volume fraction of the vapor vs. the total volume of water in the tank, and

e) the internal energy.

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.