A. an ideal vapor compression refrigeration cycle with r-134a as the working fluid. saturated vapor enters the compressor at -10°c and saturated liquid leaves the condenser at 2 mpa. the mass flow rate through the unit is 10 kg/min. determine the refrigeration capacity in tons. b. the volumetric analysis of a gas mixture shows that it consists of 70% nitrogen, 20% carbon dioxide, and 10% carbon monoxide. if the pressure and temperature of the mixture is 140 kpa and 40°c, what is the percent of carbon monoxide by mass?

Fluids at rest possess no flow energy. a)- true b)- false

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2