Aclosed system contains 1.2 kg of air, initially at 250 oc and 900kpa. the system first undergoes a polytropic process (polytropic exponent, n=1.25) to a pressure of 600 kpa, followed by a constant pressureprocess to a temperature of 250 oc and then, finally, an isothermalprocess that returns it to its initial state thus completing a cycle. determine the a)volume of the system (air) at all the statesb)boundary work for each process c)net work (sum of all individual work components) of the cycled)show the processes on a p vs vdiagram

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.

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

Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.