Which of these air-fuel mixtures gives good fuel economy and low exhaust emissions suitable for cruising conditions?
O A slightly lean mixture
O A rich mixture
O A slightly rich mixture
O An extremely rich mixture

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?

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.

Modern high speed trains do not have perpendicular expansion gaps where rails are joined end-to-end any more they are mostly welded together but what might happen if there was a spell of particularly hot weather that causes inspection of the tracks?