Asimple rankine cycle operates with water as the working fluid between the pressures of 4 mpa and 20 kpa. the fluid leaves the boiler at 550°c, the turbine efficiency is 89% and the fluid exits the condenser as saturated liquid. the flow rate is 81.5 kg/s and the pump efficiency is 52%. determine: a)- the net power output, in kw. b)- the rate of heat input in the boiler, in kw. c)- the rate of heat rejection in the condenser, in kw. d)- the overall efficiency of the bankine cycle engine.

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Fluids at rest possess no flow energy. a)- true b)- false

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?