Gce Model Questions Vol1 2021 Physics Question 10
Practice objective / multiple choice question 10 from the 2021 Gce Model Questions Vol1 Physics examination.
A police siren emits a sound of frequency 800 Hz. The siren is on a car moving towards a stationary observer at 30 m s⁻¹. Simultaneously the observer walks away from the car at 5 m s⁻¹. Take the speed of sound as 340 m s⁻¹. (a) Find the frequency heard by the observer. (b) If a second identical siren at rest also emits 800 Hz, what beat frequency does the observer hear? Give the answers to one decimal place.
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About This Question
This is Gce Model Questions Vol1 2021 Physics Question 10. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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