A sphere of radius R has a (non-uniform) volume charge density of rho = A r 3 . a) What is the unit of A. b) Calculate the total charge of the sphere. c) What is the electric filed outside of the sphere? d) What is the electric field inside of the sphere? (20 points) 5) Find the potential energy of the sphere in problem (4)

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

Of is j/kg·k. if a 2.6 kg of isk to k,is ?