State the carnor efficiency of a hear engine and the cop of a carnot refrigerator and lear pump operating between two temperature reservoirs(th and t1).

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

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux

For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.