Technician A says the charging system is needed to keep the battery fully charged and recharge the battery after starting. Technician B say the charging system supplies all the vehicle’s electrical current needs after the engine starts. Who is correct?

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?

Afan that can provide air speeds up to 60 m/s is to be used in a low-speed wind tunnel with atmospheric air at 35 c. if one wishes to use the wind tunnel to study flat-plate boundary layer behavior up to reynolds numbes of re 10, what is the minimum plate length that should be used? at what distance from the leading edge would transition occur if the critical reynolds nurnber were rer, e = 5 × 105?