The potential energy for a mass on a spring is proportional to the square of which of these quantities? OA. mass
OB. frequency
OC. period
OD. displacement
O E. velocity

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