Objective 4.4

version 1

Efficiency= useful E out/ Total E in

Useful Eout= Useful energy out (J)
Total Ein= Total energy in (J)
Efficiency= Efficiency (%)

version 2


Efficiency= Useful E out/ Total E in

Useful Eout= Useful energy out (J)
Useful Ein= Useful energy in (j)
Efficiency= Efficiency (no units; a number between 0 and 1)