A9-in wide al5182 aluminum strip is rolled from a thickness of 2in to 1.6 in. for a roll radius of 12 in and roll rpm of 100, estimate the total power required for this operation.

Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k