Answered: Assume your utility charges 5.5 cents…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section: Chapter Questions

Problem 40P: A typical cell phone consumes an average of about 1.00 W of electrical power and operates on 3.80 V....

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Brightness	250+	450+	800+	1100+	1600+
Standard	25W	40W	60W	75W	100W

Assume your utility charges 5.5 cents per kWh, remember there are 100 cents in 1 dollar and 365 days in 1 year. With this info and the "how many lumens" chart, together with the data given in the tables on the next page you now have all the information to calculate your answers.

Location	Lumens per bulb	Watts per bulb	Total # of bulbs	Total Watts	Use: hours per day	kWh per day	Total kWh for 1 year	Cost per 1 year	Cost per 10 years
Kitchen overhead	800	60	6	360	3	(360(3))/1000=1.08	394.2	$21.69	$216.90
Living room	1,600	100	3	300	4	(300(4))/1000=1.2	438
Dining Room	800		5		2

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