Vector a s has a magnitude of 8.00 units and makes an angle of 45.0° with the positive x-axis. vector b s also has a magnitude of 8.00 units and is directed along the negative x-axis. using graphical methods, fi nd (a) the vector sum a s 1 b s and (b) the vector difference a s 2 b

Intro: a solid ball of radius rb has a uniform charge density ρ. part a: what is the magnitude of the electric field e(r) at a distance r> rb from the center of the ball? express your answer in terms of ρ, rb, r, and ϵ0. part b: what is the magnitude of the electric field e(r) at a distance r express your answer in terms of ρ, rb, r, and ϵ0. part c: let e(r) represent the electric field due to the charged ball throughout all of space. which of the following statements about the electric field are true? check all that apply. e(0) = 0 e(rb)=0 limr→∞e(r)=0 the maximum electric field occurs when r=0 the maximum electric field occurs when r=rb the maximum electric field occurs as r→∞.