Consider an ideal ericsson cycle with air as the working fluid executed in a steady-flow system. air is at 27°c and 110 kpa at the beginning of the isothermal compression process, during which 150 kj/kg of heat is rejected. heat transfer to air occurs at 950 k. the gas constant of air is r = 0.287 kj/kg·k.
a.)the maximum pressure in the cycle is? kpa
b.)the net work output per unit mass of air is? kj/kg
c.)the thermal efficiency of the cycle is? %.

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)

What is the name for the remnant of an asymptotic giant that has lost its shells? black dwarf white dwarf yellow giant black hole

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot