An air conditioner operating at steady state is set maintain an inside temperature of a house at 74°f. if the rate of heat transfer through the walls is 1,420 btu/(hr a°r), b 2.7 (assume constant with changes in outside temperature) and an ideal compressor on the air conditioner operators at 4.2 hp. what is the maximum outside temperature where the house can still maintain its temperature?

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)