Sound Propagation
Physics ⇒ Waves and Sound
Sound Propagation starts at 7 and continues till grade 12.
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See sample questions for grade 11
Describe the process of echo formation.
Describe what happens to the amplitude of a sound wave as it propagates through a medium.
Explain why astronauts cannot hear each other on the moon without radios.
Explain why sound travels faster in solids than in gases.
Explain why thunder is heard after lightning is seen during a storm.
A person shouts near a cliff and hears the echo after 2 seconds. If the speed of sound in air is 340 m/s, how far is the cliff from the person?
A sound wave has a frequency of 500 Hz and a wavelength of 0.68 m. What is the speed of sound in the medium?
A sound wave has a wavelength of 1.7 m and a speed of 340 m/s. What is its frequency?
A sound wave travels 1700 meters in 5 seconds. What is the speed of sound in this case?
If the temperature of air increases, the speed of sound in air will:
(1) Increase
(2) Decrease
(3) Remain the same
(4) Become zero
Which of the following best describes the direction of particle vibration in a sound wave traveling through air?
(1) Perpendicular to the direction of wave travel
(2) Parallel to the direction of wave travel
(3) At an angle to the direction of wave travel
(4) Randomly
Which of the following is necessary for the propagation of sound?
(1) Vacuum
(2) Medium
(3) Light
(4) Heat
Which of the following is NOT a factor affecting the speed of sound in a medium?
(1) Temperature
(2) Pressure
(3) Humidity
(4) Color of the medium
Sound waves are ______ waves.
The minimum distance required between a source and a reflecting surface to hear an echo (if the speed of sound is 340 m/s and the persistence of hearing is 0.1 s) is ______ meters.
The region in a sound wave where particles are close together is called ______.
The region in a sound wave where particles are far apart is called ______.
Sound cannot travel through a vacuum. True or False?
Sound travels faster in humid air than in dry air. True or False?
Sound waves can be reflected, refracted, and diffracted. True or False?
