A dishonest factory owner runs a factory large of them are running, they produce a sound with a sound level of 107 dB. Government regulations require such factories to have a sound level no louder than 90.0 dB. When this owner sees federal inspectors arriving, he laughs and tells his workers to quickly turn off 75% of the machines. He assumes the sound will be below the limit. Does this tactic reduce the sound to 90 dB or lower? Answer by finding the sound level with 75% of the machines turned off.

College Physics
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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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A dishonest factory owner runs a factory with a large number of noisy machines. When all
of them are running, they produce a sound with a sound level of 107 dB. Government
regulations require such factories to have a sound level no louder than 90.0 dB. When this
owner sees federal inspectors arriving, he laughs and tells his workers to quickly turn off
75% of the machines. He assumes the sound will be below the limit. Does this tactic reduce
the sound to 90 dB or lower? Answer by finding the sound level with 75% of the machines
turned off.
Transcribed Image Text:A dishonest factory owner runs a factory with a large number of noisy machines. When all of them are running, they produce a sound with a sound level of 107 dB. Government regulations require such factories to have a sound level no louder than 90.0 dB. When this owner sees federal inspectors arriving, he laughs and tells his workers to quickly turn off 75% of the machines. He assumes the sound will be below the limit. Does this tactic reduce the sound to 90 dB or lower? Answer by finding the sound level with 75% of the machines turned off.
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