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 10
Describe the process of sound propagation in solids.
Describe what happens to the speed of sound as the temperature of air increases.
Explain why astronauts cannot talk to each other on the Moon without radios.
Explain why sound travels faster in solids than in gases.
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 travels 660 meters in 2 seconds. What is its speed?
The time interval between a sound and its echo is 0.5 seconds. If the speed of sound is 340 m/s, what is the distance to the reflecting surface?
Sound waves cannot travel through which of the following?
(1) Water
(2) Air
(3) Steel
(4) Outer space
Which of the following best describes the propagation of sound in air?
(1) Movement of air particles from source to listener
(2) Vibration of air particles about their mean positions
(3) Transfer of heat energy
(4) Movement of electrons
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 characteristic of sound propagation?
(1) Reflection
(2) Refraction
(3) Diffraction
(4) Polarization
Sound is a type of ________ wave.
Sound waves are ________ waves because the particles of the medium vibrate parallel to the direction of wave propagation.
The minimum distance required between the source and the reflecting surface to hear a distinct echo is ________ meters.
The phenomenon of hearing your own voice after it is reflected from a distant surface is called ________.
If the temperature of air increases, the speed of sound in air will decrease. True or False?
Sound cannot travel through a vacuum. True or False?
Sound travels faster in humid air than in dry air. Yes or No?
The speed of sound in water is approximately 1500 m/s. True or False?
