A standard flashlight battery can deliver about 2.0 W h of energy before it runs down.

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A standard flashlight battery can deliver about 2.0 W ∙ h of energy before it runs down.

(a) If a battery costs US$0.80, what is the cost of operating a 100 W lamp for 8.0 h using batteries?

(b) What is the cost if energy is provided at the rate of US$0.06 per kilowatt-hour?

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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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Question Posted: Jan 20, 2011 04:47 AM

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A standard flashlight battery can deliver about 2.0 W h of energy before it runs down.

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a The cost is 100 ...View the full answer

Fundamentals of Physics

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