Which shape caused the most build up of pressure? With increased pressure, what happens as a result?

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

How would a small bar magnet be oriented when placed at position x?

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?