(a) A charge -318e is uniformly distributed along a circular arc of radius 7.00 cm, which subtends an angle of 49o. What is the linear charge density along the arc?
(b) A charge -318e is uniformly distributed over one face of a circular disk of radius 3.10 cm. What is the surface charge density over that face?
(c) A charge -318e is uniformly distributed over the surface of a sphere of radius 5.00 cm. What is the surface charge density over that surface?
(d) A charge -318e is uniformly spread through the volume of a sphere of radius 2.70 cm. What is the volume charge density in that sphere?