Q. An electron starts from rest 4.00 cm from the center of a uniformly charged sphere of radius 2.00 cm. If the sphere carries a total charge of 1.00 multiplied by 10-9 C, how fast will the electron be moving when it reaches the surface of the sphere?
Q. A charge of -3.80 nC and a charge of -6.00 nC are separated by a distance of 60.0 cm. Find the position at which a third charge of +7.30 nC can be placed so that the net electrostatic force on it is zero.