Answer to Question #199962 in Physics for Jes

Question

An energy-efficient lightbulb, taking in 10.0 W of power, can produce the same level of brightness as a conventional bulb operating at power 100 W. The lifetime of the energy efficient bulb is 15 000 h and its purchase price is 320.0 php, whereas the conventional bulb has lifetime 1000 h and costs 39php per bulb. Determine the total savings obtained by using one energy-efficient bulb over its lifetime, as opposed to using conventional bulbs over the same time period. Assume an energy cost of 8.4067 php per kWh.

Answer 1

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