Arunner makes one lap around a 200m track of 25 s. what were the runner’s (a) average speed and (b) average velocity?

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2

The energy equivalent of the rest mass of an electron is

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?