Carbon dioxide enters a compressor at 100 kPa and 300 K at a rate of 0.2 kg/sec and exits at 600 kPA and 450 K. Determine the power input to the compressor if no irreversibility are present. Assume surroundings are at 25 oC.
a. 25.5 kW
b. 30 kW
c. 15.5 kW
d. 10 kW

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

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.

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?