F = q₁q₂C / r²
F force
q charge
C Coulomb constant
r separation between charges
Models are very common. The ingredients list on a bottle of ketchup is a model of its contents, and margarine is a model of butter. A box score from a baseball game is a model of the actual event. A trial over an automobile accident is a model of the actual accident.
C would be the right answer edu
Conduction. Because they are connected as they tranfer energy