A standard flashlight battery can deliver about 2.0 W h of energy before it runs down.
Question:
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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a The cost is 100 ...View the full answer
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Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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