1) A balloon rubbed against denim gains a charge of -8.45µC. What is the electric force between the balloon and the denim when the two are separated by a distance of 4.7cm? (Assume the charges are located at a point)
2)Two identical conducting spheres are placed with their centers 0.34m apart. One is given a charge of +12x10-9C, and the other is given a charge of -18x10-9C.
a)Find the electric force exerted on one sphere by the other.
b)The spheres are connected by a conducting wire. After equilibrium has occurred, find the electric force between the two spheres
3). Two stationary point charges of +61.0µC and +0.48µC exert a repulsive force on each other of 172N. What is the distance between the two charges?