>A standard flashlight battery can deliver about 2.0 Wh of energy before it runs down. If a battery cost 60 cents, what is the cost of operating a 100 w lamp for 7.0h using bateries? (Enter dollars with no unit) What is the cost if power provided by an electric utility company, at 4.5 cents per kilowatt-hour, is used? (dollars)
>A standard flashlight battery can deliver about 2.0 Wh of energy before it runs down. If a battery cost 60 cents, what is the cost of operating a 100 w lamp for 7.0h using bateries? (Enter dollars with no unit) What is the cost if power provided by an electric utility company, at 4.5 cents per kilowatt-hour, is used? (dollars)
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Transcribed Image Text:>A standard flashlight battery can deliver about
2.0 Wh of energy before it runs down. If a battery cost 60
cents, what is the cost of operating a 100 W lamp for
7.0h using bateries? (Enter dollars with no unit)
What is the cost if power provided by an electric utility
company, at 4.5 cents per kilowatt-hour, is used? (dollars)
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