Neco 2023 Physics Question 12

Practice objective / multiple choice question 12 from the 2023 Neco Physics examination.

Neco 2023 Physics Objective / Multiple Choice Medium Difficulty

Question 12 NECO • 2023 • PHYSICS • objective

A source S1 of frequency 600 \(\text{Hz}\) moves directly towards a stationary observer O with speed 30 \(\text{m/s}\). At the same time a second identical source S2 is fixed and also emits 600 \(\text{Hz}\). The observer moves away from the sources with speed u (unknown). The speed of sound in air is 340 \(\text{m/s}\). The observer hears a beat frequency of 50 \(\text{Hz}\). Determine the speed u of the observer (in \(\text{m/s}\), to two decimal places).

Correct Answer A. u \approx 47.22 \(\text{m/s}\)

B. u \approx 52.30 \(\text{m\/s}\)

C. u \approx 39.80 \(\text{m\/s}\)

D. u \approx 42.15 \(\text{m\/s}\)

Correct Answer

Correct Option:

u \approx 47.22 \(\text{m/s}\)

This is Neco 2023 Physics Question 12. It is one of the objective questions from the 2023 Neco Physics examination.

Difficulty level: Medium .

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