(1) An incandescent light bulb produces 5.85 Joules of light energy each second. This bulb is 7.80% efficient, meaning that only 7.80% the total energy it consumes becomes light and the rest becomes waste heat. A 12.0 W fluorescent bulb is designed to produce the same illumination (in Joules of light energy per second) as the incandescent bulb. A large building uses 17,530 light bulbs. At a cost of 8.56c/kW-hr for electricity, how much money will the owners of the building save each year if they use fluorescent bulbs instead of incandescent bulbs? Express your answer in dollars. [answer: about $828,000]
(1) An incandescent light bulb produces 5.85 Joules of light energy each second. This bulb is 7.80% efficient, meaning that only 7.80% the total energy it consumes becomes light and the rest becomes waste heat. A 12.0 W fluorescent bulb is designed to produce the same illumination (in Joules of light energy per second) as the incandescent bulb. A large building uses 17,530 light bulbs. At a cost of 8.56c/kW-hr for electricity, how much money will the owners of the building save each year if they use fluorescent bulbs instead of incandescent bulbs? Express your answer in dollars. [answer: about $828,000]
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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![(1) An incandescent light bulb produces 5.85 Joules of light energy each second. This bulb is 7.80%
efficient, meaning that only 7.80% the total energy it consumes becomes light and the rest becomes waste
heat. A 12.0 W fluorescent bulb is designed to produce the same illumination (in Joules of light energy
per second) as the incandescent bulb. A large building uses 17,530 light bulbs. At a cost of 8.56¢/kW-hr
for electricity, how much money will the owners of the building save each year if they use fluorescent
bulbs instead of incandescent bulbs? Express your answer in dollars. [answer: about $828,000]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F56cdda57-70a5-4d4f-8db2-c3e75050b484%2Fabab47eb-f9ad-43c9-8336-a19acc8ceb8c%2Fal1p0rd_processed.png&w=3840&q=75)
Transcribed Image Text:(1) An incandescent light bulb produces 5.85 Joules of light energy each second. This bulb is 7.80%
efficient, meaning that only 7.80% the total energy it consumes becomes light and the rest becomes waste
heat. A 12.0 W fluorescent bulb is designed to produce the same illumination (in Joules of light energy
per second) as the incandescent bulb. A large building uses 17,530 light bulbs. At a cost of 8.56¢/kW-hr
for electricity, how much money will the owners of the building save each year if they use fluorescent
bulbs instead of incandescent bulbs? Express your answer in dollars. [answer: about $828,000]
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