Neco 2022 Physics Question 41

Practice objective / multiple choice question 41 from the 2022 Neco Physics examination.

Neco 2022 Physics Objective / Multiple Choice Medium Difficulty
Question 41 NECO • 2022 • PHYSICS • objective

A stationary source emits a sound of unknown frequency. An observer moves directly towards the source at a constant speed and hears a frequency of 500 Hz. When the observer reverses direction and moves away from the source at the same speed, the heard frequency is 460 Hz. The speed of sound in air is \(340 \text{m s}^{-1}\). Determine (i) the speed of the observer and (ii) the original frequency of the source.

Answer Options

A. Observer speed = 15.0 \\text{m s}^{-1}; source frequency = 490 \\text{Hz}
B. Observer speed = 12.5 \\text{m s}^{-1}; source frequency = 470 \\text{Hz}
C. Observer speed = 13.8 \\text{m s}^{-1}; source frequency = 500 \\text{Hz}
Correct Answer D. Observer speed = 14.2 \text{m s}^{-1}; source frequency = 480 \text{Hz}
Correct Answer
D
Correct Option:
Observer speed = 14.2 \text{m s}^{-1}; source frequency = 480 \text{Hz}

About This Question

This is Neco 2022 Physics Question 41. It is one of the objective questions from the 2022 Neco Physics examination.

Difficulty level: Medium .

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