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 9
Describe the difference between compression and rarefaction in a sound wave.
Describe what happens to the particles of a medium as a sound wave passes through it.
Describe what happens to the sound of a siren as an ambulance moves away from you.
Explain why sound cannot travel through outer space.
A person shouts across a canyon and hears an echo 2 seconds later. If the speed of sound in air is 340 m/s, how wide is the canyon?
A sound wave has a frequency of 500 Hz and a wavelength of 0.68 m. What is the speed of sound in this medium?
A sound wave has a wavelength of 2 m and a speed of 340 m/s. What is its frequency?
A submarine uses sonar to detect an object underwater. The sound pulse returns after 4 seconds. If the speed of sound in water is 1500 m/s, how far is the object?
If the temperature of air increases, the speed of sound in air will:
(1) Increase
(2) Decrease
(3) Remain the same
(4) Stop
The speed of sound in water is approximately:
(1) 340 m/s
(2) 1500 m/s
(3) 5000 m/s
(4) 30,000 m/s
The speed of sound is fastest in which of the following?
(1) Air
(2) Water
(3) Steel
(4) Vacuum
Which of the following best describes how sound travels through air?
(1) By creating electric currents
(2) By vibrating air particles
(3) By moving light waves
(4) By chemical reactions
Fill in the blank: Sound is a form of ________ wave.
Fill in the blank: The distance between two consecutive compressions in a sound wave is called the ________.
Fill in the blank: The loudness of a sound depends on its ________.
Fill in the blank: The region where particles are close together in a sound wave is called ________.
Sound cannot travel through a vacuum. True or False?
Sound travels faster in solids than in liquids. True or False?
Sound travels slower in cold air than in warm air. True or False?
Sound waves are transverse waves. True or False?
