College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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A loudspeaker, mounted on a tall pole, is engineered to
emit 75% of its sound energy into the forward hemisphere,
25% toward the back. You measure an 85 dB sound
intensity level when standing 1.0 m in front of and 2.5 m
below the speaker.
Part A
What is the speaker's power output?
Express your answer with the appropriate units.
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Transcribed Image Text:A loudspeaker, mounted on a tall pole, is engineered to emit 75% of its sound energy into the forward hemisphere, 25% toward the back. You measure an 85 dB sound intensity level when standing 1.0 m in front of and 2.5 m below the speaker. Part A What is the speaker's power output? Express your answer with the appropriate units. ► View Available Hint(s)
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