Amachinable grade of aluminum is to be milled on an nc machine with a 20 mm diameter four tooth end miling cutter, cutting speed = 120 m/min and feed = 0.008 mm/tooth. convert these values to rev/min and mm/rev, respectively.

For a process taking place in a closed system containing gas, the volume and pressure relationship is pvi-constant. -1.5 bar, the process starts with initial conditions, pi = =0.03 m3 and ends with final volume, v2-0.05 m3 determine the work done by the gas.