An air conditioning system operating on the revered carnot vyvle is required to transfer heat from a house at rate of 750kj/min, maintain its temperature at 20๐c,
if the outdoor air temperature is 35๐c,
determine the power required to operate the air conditioning system.

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

Asteam is contained in a rigid tank with a volume of 1 m3. initially, the pressure and temperature are 7 bar and 500 oc, respectively. the temperature drops due to cooling process. determine: (1) the temperature at which condensation begins in °c, (2) the fraction of the total mass that has condensed when the pressure decreased to 0.5 bar. (3) the volume in m3 occupied by saturated liquid at the final state?

Starting wih an energy balance on a rectangular volume element, derive the one- dimensional transient heat conduction equation for a plane wall with constant thermal conductivity and no heat generation.