Air enters the compressor of an air-standard brayton cycle with a volumetric flow rate of 60 m3/s at 0.8 bar, 280 k. the compressor pressure ratio is 15, and the maximum cycle temperature is 1950 k. for the compressor, the isentropic efficiency is 92% and for the turbine the isentropic efficiency is 95%.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

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.