Posted by Adrian on .
Two identical point charges are separated by a distance of 3.0 cm and they repel each other with a force of 4 X 10^5 N. What is the new force if the distance between the point charges is doubled?

Physics 
drwls,
An inverse square law applies tp both gravitational and electrostatic forces.
If you double the distance between two objects, the force is decreased by a factor of 1/2^2, which is 1/4
Multiply that by the original force and you get 1 x 10^5 N 
*Physics 
Anonymous,
u spelled physics wrong