Air contained in an upright piston/cylinder arrangement is compressed from an initial pressure of 10 atm. and volume of 0.42m^3 to a final pressure of 25 atm. if the atmospheric pressure is 1.013 bar and the cylinder contains 5kg of air, find the final temperature, the work done and the heat transfer if the expansion occurs: isothermally, polytropically with an index of expansion of 1.3, isentropically with γ = 1.4.

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.

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false