Two like and equal charges are at a distance of d=5cm and exert a force of F=9×10−3N on each other. Find the magnitude of each charge?
What is the direction of the electrostatic force between them?

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?

This is the number of complete movements of a wave per second.