7. Iron typically has body-centered cubic (BCC) structure at room temperature. In the iron unit cell, (a) how many iron atoms per nm are there in the [111] direction? (10 points) (b) how many iron atoms per nm are there in the [110] direction? (Given that iron atomic radius is 0.124nm) (10 points)

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.

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid

For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.