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?

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

What object a collides with object b and bounces back its final momentum is?

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.