Answer:
Fe = 7.98*10^5N/C
Step-by-step explanation:
In order to calculate the electric force between the two charges you use the following formula:
(1)
k: Coulomb's constant = 8.98*10^9Nm^2/C^2
q1 = 2mC = 2*10^-3C
q2 = 4mC = 4*10^-3C
r: distance between the charge = 30cm = 0.3m
You replace the values of the parameters in the equation (1):
![F_e=(8.98*10^9Nm^2/C^2)((2*10^(-3)C)(4*10^(-3)C))/((0.3)^2)\\\\F_e=7.98*10^5(N)/(C)](https://img.qammunity.org/2021/formulas/physics/high-school/jsu8o4lir6mddgdlugmmm4ip6usi2haxwo.png)
The force between the charges q1 and q2 is 7.98*10^5N/C