Answer to Question #333938 in Mechanics | Relativity for soph

Question

Incandescent lightbulbs have a power output rating of 60.0W, while a CFL bulb has a power output rating of 13.0W. Determine the difference in the amount of energy each bulb burns in 1 hour if a CFL is 85% efficient and an incandescent bulb is 65% efficient.

Answer 1

$∆Q=(\eta_1W_1-\eta_2W_2)t=0.1~MJ.$