Two identical conducting spheres, A and B, sit atop insulating stands. When they are touched, 1.51 × 1013 electrons flow from sphere B to sphere A. If the total net charge on the spheres is +3.68 μC, what was the initial charge on sphere B?

A = -0.576 μC

B = 4.256 μC

Explanation:

Suppose a single electron charge is . Then the total charge that is flowing from B to A is:

Let A and B be the initial charge of spheres A and B, respectively. Since the net charge is 3.68μC we have the following equation

(1)

When they touch 2.416μC flows from B to A, then they are equal, so we have the following equation

(2)

Add equation (1) to equation (2) we have

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

conduction, convection, radiation