Propagation of Sound Waves - Jamb Physics Past Questions and Answers

Question 31:

• JAMB 2018

A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 3.40ms\(^-1\), how far is he from the hill?

A. 66m
B. 136m
C. 264m
D. 528m

Question 32:

• JAMB 2019

Which of the following media allow the transmission of sound waves through them?
I. air
II. liquid
III. solids


A. I & II only
B. I & III only
C. II & III only
D. I, II & III

Question 33:

• JAMB 2019

A car moving at 20m/s with its horn blowing (f = 1200Hz) is chasing another car going at 15m/s. What is the apparent frequency of the horn as heard by the driver being chased?

A. 1.22KHz
B. 2.40KHz
C. 8.12KHz
D. 1.22Hz

Question 34:

• JAMB 2020

When a sound wave passes from air into water its

A. Speed and frequency increases but its wavelength remains the same
B. Speed and wavelength increases but its frequency remains the same
C. Speed decreases
D. Speed increases but its frequency and wavelength decreases

Question 35:

• JAMB 2020

A ship travelling towards a cliff receives the echo of its whistle after 3.5 seconds. A short while later, it receives the echo after 2.5 seconds. If the speed of sound in air under the prevalling condition is 250ms -1, how much closer is the ship to the cliff?

A. 10m
B. 350m
C. 175m
D. 125m