Neco Model Questions Vol1 2019 Physics Question 28
Practice objective / multiple choice question 28 from the 2019 Neco Model Questions Vol1 Physics examination.
A police car approaches a stationary observer with a speed of 30.0 m s\(^{-1}\). The siren on the car has a frequency of 800 Hz. At the same instant a stationary loudspeaker located at the observer's position emits a tone of 780 Hz. Take the speed of sound in air as 340 m s\(^{-1}\). (a) What frequency does the observer hear from the police car? (b) What is the beat frequency produced by the two sounds heard simultaneously?
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About This Question
This is Neco Model Questions Vol1 2019 Physics Question 28. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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