Two charges are separated by 3 meters. if each charge is 2 pc, what is the force by one charge on the other?

there are two kinds of charge, positive and negative

like charges repel, unlike charges attract

positive charge comes from having more protons than electrons; negative charge comes from having more electrons than protons

charge is quantized, meaning that charge comes in integer multiples of the elementary charge e

charge is conserved

powerful computers now, not then