Water vapor at 1000°f, 140 psia, is expanded to 2 psia across a turbine operating at steady state. if there are 4 lbm/s of steam flowing and the total developed shaft power is 1600 btu/s, calculate the isentropic turbine efficiency. treat the turbine as being adiabatic and neglect any kinetic or potential energy changes.

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.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody