Waec Model Questions Vol1 2021 Physics Question 19
Practice objective / multiple choice question 19 from the 2021 Waec Model Questions Vol1 Physics examination.
A loudspeaker emits sound uniformly in air. At a distance of 5 m from the speaker the intensity level is measured as 90 dB. The atmospheric absorption coefficient for the sound is 0.005 dB m⁻¹. Assuming spherical spreading of the sound, determine the intensity level (in dB, to one decimal place) at a distance of 20 m from the speaker, taking both spherical spreading and atmospheric absorption into account.
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About This Question
This is Waec Model Questions Vol1 2021 Physics Question 19. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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