Question
An $11.0-\mathrm{W}$ energy-efficient fluorescent lamp is designed to produce the same illumination as a conventional $40.0-\mathrm{W}$ incandescent lightbulb. How much money does the user of the energy-efficient lamp save during 100 $\mathrm{h}$ of use? Assume a cost of $\$ 0.0800 / \mathrm{kWh}$ for energy from the electric company.
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The energy consumed by a device is given by the formula $E = P \times t$, where $E$ is the energy, $P$ is the power of the device, and $t$ is the time for which the device is used. Show more…
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An 11.0 -W energy-efficient fluorescent lightbulb is designed to produce the same illumination as a conventional $40.0-\mathrm{W}$ incandescent lightbulb. Assuming a cost of $\$ 0.110 / \mathrm{kWh}$ for energy from the electric company, how much money does the user of the energy-efficient bulb save during 100 $\mathrm{h}$ of use?
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