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)

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.