Technician a says that one reason to use several small valves instead of two after valves is to increase the size of the open port when the valves are open. technician b says that the area of two small valves added together is often smaller than the area of one larger value. who is right? a. technician b only. b. both technician a and b. c. technician a only. d. neither technician a or b

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

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.

Wiy doeres rere okhn a pump whon working betwon the same pressure range?