Two charged particles are place 2.0 meters apart. The first charge is +2.0 C and the second charge is +4.0 C. What is the electrical force between the two charges?

An observer that stands still as the electron moves by him, will observe

During a car accident, a 125kg driver is moving at 31m/s and in 1.5s is brought to rest by an inflating air bag. what is the magnitude of the change in momentum to the driver

Galileos view of arrangement of the universe