A storage building 8'x10' with 2"x6" floor framing, 3/4" plywood floor, 2"x4" stud walls, 1/2" sheathing, one 36"x 24" window, one 6'x 6'-8" door opening and build two barn doors, 6/12 pitch on the roof, 2"x4" framing for roof, 5/8" plywood for the roof, with black Architectural shingles. Please estimate how much of each material and come up with a total cost.

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?