For a control volume, cv, σ(mass in)-σ(mass out) =? a)-0 b)- constant c)- change of energy contained in the cv d)- change of mass contained in the cv e)- rate of change of energy contained in the cv

What precautions should you take to prevent injuries when dealing with heavy loads?

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.

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan