Ana is creating a model to show atoms of soild, liquid bromine, and gaseous bromine. how should her three models differ?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

In science and physics what is the standard unit of measure for speed?

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?