If the social distancing length between two students is doubled from two metered to four meters, does the gravitational force between the two students increase or decrease? Explain your reasoning!

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Excuse ! extra points plus ! super desperate ! the position of an object does not move relative to a reference point. relative to the reference point the object _. a.) is not moving. b.) is moving.

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?