For each of the following stacking sequences found in fcc metals, cite the type of planar defect that exists: (a) . . a b c a b c b a c b a . .(b) . . a b c a b c b c a b c . .now, copy the stacking sequences and indicate the position(s) of planar defect(s) with a vertical dashed line.

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.

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Brief discuss how the presence of dislocations in crystal structures can be an advantage and a disadvantage to engineer and designers.