Physicists often use a different unit of energy, the electron volt, when dealing with energies at the atomic level. one electron volt, abbreviated ev, is defined as the amount of kinetic energy gained by an electron upon accelerating through a 1.0 v potential difference.

Amedium water hose can fill a pool in 30 minutes. a larger water hose can fill the same pool in 20 minutes. if both hoses are turned on at the same time, how long will it take to fill the pool? -what equation can be used to solve this work problem? -how many minutes will it take both hoses to fill the pool?