An energy-efficient lightbulb, taking in 28.0 W ofpower, can produce the same level of
Chapter 8, Problem 33(choose chapter or problem)
An energy-efficient lightbulb, taking in 28.0 W ofpower, can produce the same level of brightness as aconventional lightbulb operating at power 100 W. The lifetime of the energy-efficient bulb is 10 000 h and itspurchase price is $4.50, whereas the conventional bulbhas a lifetime of 750 h and costs $0.42. Determine thetotal savings obtained by using one energy-efficientbulb over its lifetime as opposed to using conventionalbulbs over the same time interval. Assume an energycost of $0.200 per kilowatt-hour.
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