2. A 20 H inductor and a 10 H inductor are connected in parallel. The total circuit inductance is O A. 4.68 H
OB.3.68 H
OC. 2.45 H
O D. 6.67 H

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

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

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?