Water flowing in a pipe at a rate of 30 kg/s enters a valve at state 1. The temperature and pressure at state 1 are 300 Celsius and 10 MPa, respectively. The water leaves the valve at state 2 and immediately enters a flash chamber operating at 500 kPa. The vapor leaves the flash chamber at state 3 and the liquid leaves at state 4. Determine the following: a. The enthalpy at state 1
b. The quality at state 2
c. The temperature at state 2
e. The mass flow rate of liquid leaving the chamber

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

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.

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.