Which condition must exist in order for conduction to occur between two substances? The molecules of the substances must be touching.
Both substances must be the same temperature.
At least one substance must be a liquid.
Most of the molecules must be slow moving.

An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 26 mm and 103 mm. the electric potential of the inner conductor with respect to the outer conductor is - 700 v (k = 1/4πε 0 = 8.99 × 109 n · m2/c2) the energy stored in a 1.0-m length of this capacitor is closest to