An hover craft vehicle operates by moving atmospheric air ( = 1.22 kg/m3 ) with a large fan through the skirt of the vehicle which creates a 3 cm clearance with the ground. If the vehicle weighs 50 kN find a) the required air volumetric flow rate and b) the fan power. (30.6 m3 /s, 54 kW)

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false

Burgers vector is generally parallel to the dislocation line. a)-true b)-false