Air enters an insulated nozzle at 500 °R with a velocity of 100 ft/s. The Air exits the nozzle at 300 °R with a pressure of 20 lbf/in2. The area of the nozzle at the exit is 0.005 ft2. Find the mass flow rate of the air, in lbm/s. Assume air is an ideal gas with k= 1.365. Neglect potential energy

The mass flow rate of the fluid remains constant in all steady flow process. 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.

Asteam is contained in a rigid tank with a volume of 1 m3. initially, the pressure and temperature are 7 bar and 500 oc, respectively. the temperature drops due to cooling process. determine: (1) the temperature at which condensation begins in °c, (2) the fraction of the total mass that has condensed when the pressure decreased to 0.5 bar. (3) the volume in m3 occupied by saturated liquid at the final state?