Neco 2020 Physics Question 31

Practice objective / multiple choice question 31 from the 2020 Neco Physics examination.

Neco 2020 Physics Objective / Multiple Choice Medium Difficulty

Question 31 NECO • 2020 • PHYSICS • objective

A source of sound emits a frequency of 500 Hz and moves directly towards a stationary observer. The observer hears a frequency of 540 Hz. The speed of sound in air is \(340\ \text{m s}^{-1}\). (i) Find the speed of the source (to the nearest 0.1 \(\text{m s}^{-1}\)). (ii) Determine the wavelength of the sound in air produced by the source.

A. 27.8 m s^{-1}, 0.58 m

B. 22.5 m s^{-1}, 0.71 m

C. 30.0 m s^{-1}, 0.53 m

Correct Answer D. 25.2 m s^{-1}, 0.63 m

Correct Answer

Correct Option:

25.2 m s^{-1}, 0.63 m

This is Neco 2020 Physics Question 31. It is one of the objective questions from the 2020 Neco Physics examination.

Difficulty level: Medium .

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