Asquare aluminum plate 5 mm thick and 200 mm on a side is heated while vertically suspended in quiescent air at 40ºc. determine the average heat transfer coefficient for the plate when its temperature is 15ºc by using the handout correlations.

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.