Etanol (C2H6O) dapat bercampur dengan air pada suhu 20 oC, namun pentanol (C5H12O) dapat larut di dalam air hanya sebesar 2.7 g/100 mL. Jelaskan alasan yang
tepat untuk fenomena ini. (point:

Burgers vector is generally parallel to the dislocation line. 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.