A perfectly stirred, constant-volume tank has two input streams, both consisting of the same liquid. The temperature and flow rate of each of the streams can vary with time. Derive a dynamic model of the process. Subsequently, make a "degrees of freedom" analysis assuming that both streams 1 and 2 come from upstream units (i. e., their flow rates and temperatures are known functions of time). Notes: wi denotes mass flow rate for stream i. Liquid properties are constant (not functions of temperature).

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

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)

Determine the maximum r-value of the polar equation r =3+3 cos 0