Reflection of sound; echoes, reverberation and their applications - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1979

Radio carrier waves are generated by causing electrons to oscillate rapidly in

A. A microphone
B. A television camera
C. An antenna
D. Coaxial cables
E. A transmitter

Question 3:

• JAMB 1980

A man stands one-third of the way between two walls and claps his hands, He hears two distinct echoes 1s apart. If the speed of sound is 330ms^-1 the distance between the wall is

A. 33m
B. 110m
C. 220m
D. 330m
E. 495m

Question 4:

• JAMB 1985

In order to find the depth of the sea, a ship sends out a sound wave and receives an echo after one second. If the velocity of sound in water is 1500ms^-1, what is the depth of the sea?

A. 0.75km
B. 1.50km
C. 2.20km
D. 3.00km
E. 3.75km

Question 5:

• JAMB 1986

Which of the following is true of sounds?

A. Sound travels faster in air at 20^oC than at 30^oC
B. The frequency of a given sound wave changes when it crosses the boundary seperating two media
C. The wavelength of a given sound wave in air decreases as the temperature increases
D. Sound waves cannot be reflected