Tech A says that lithium-ion batteries currently have the highest energy density of batteries used in HEV's. Tech B says that nickel–metal hydride batteries are less expensive than lithium-ion batteries. Who is correct? Group of answer choices

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.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

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