Why might scientists usea model to show the movement of the continents?

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

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?

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt