Explain why you jump in the air, you move but the ground doesn’t move much.

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

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?

What is the role of lenses in microscopy?