21. If electricity costs 8¢/kWh, how much does it cost to burn a 90 W bulb for one day?
8 c/(kW h)* 0.090 kW * 24h = 17.3 cents
well... 90 watts times 24 hours is 2160 watt hours
divide by 1000 to get Kwh we get 2.16 Kwh
multiply by .08 $/Kwh = .17 -- about 17 cents
Copyright © 2024 1QUIZZ.COM - All rights reserved.
Answers & Comments
Verified answer
8 c/(kW h)* 0.090 kW * 24h = 17.3 cents
well... 90 watts times 24 hours is 2160 watt hours
divide by 1000 to get Kwh we get 2.16 Kwh
multiply by .08 $/Kwh = .17 -- about 17 cents