Neco 2025 Physics Question 8
Practice objective / multiple choice question 8 from the 2025 Neco Physics examination.
A source emits sound of frequency \(800\ \text{Hz}\) in air where the speed of sound is \(340\ \text{m s}^{-1}\). The source moves directly towards a stationary observer with a speed of \(30\ \text{m s}^{-1}\) while the observer simultaneously moves directly away from the source with a speed of \(20\ \text{m s}^{-1}\). (a) What frequency does the observer hear? (b) The observer also hears a second stationary source emitting a frequency of \(795\ \text{Hz}\). Determine the beat frequency heard by the observer.
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About This Question
This is Neco 2025 Physics Question 8. It is one of the objective questions from the 2025 Neco Physics examination.
Difficulty level: Medium .
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