Speed of Sound
Physics ⇒ Waves and Sound
Speed of Sound starts at 8 and continues till grade 12.
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See sample questions for grade 10
Describe how the speed of sound changes as it moves from air into water.
Describe the effect of pressure on the speed of sound in air at constant temperature.
Describe what happens to the speed of sound as altitude increases (assuming constant temperature).
Explain how temperature affects the speed of sound in air.
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 wavelength of 2 meters and a frequency of 170 Hz. What is the speed of sound in this case?
A sound wave takes 0.5 seconds to travel from one end of a 170 m long tunnel to the other. What is the speed of sound in the tunnel?
A sound wave travels 1020 meters in 3 seconds. What is the speed of sound in this medium?
If the temperature of air increases, the speed of sound in air will:
(1) Increase
(2) Decrease
(3) Remain the same
(4) First increase then decrease
The speed of sound is fastest in which of the following media?
(1) Air
(2) Water
(3) Steel
(4) Vacuum
Which factor does NOT affect the speed of sound in air?
(1) Temperature
(2) Humidity
(3) Air pressure
(4) Frequency of sound
Which of the following best explains why sound travels faster in water than in air?
(1) Water is denser than air
(2) Water molecules are closer together than air molecules
(3) Water is a liquid
(4) Water is transparent
Fill in the blank: The speed of sound in air at 0°C is approximately _______ m/s.
Fill in the blank: The speed of sound in air increases by about _______ m/s for each 1°C rise in temperature.
Fill in the blank: The speed of sound in air is _______ than the speed of sound in water.
Fill in the blank: The speed of sound in hydrogen gas is _______ than in oxygen gas.
A thunderstorm is seen before it is heard. This is because light travels much faster than sound. True or False?
Does sound travel faster in humid air than in dry air?
Sound cannot travel through a vacuum. True or False?
True or False: The speed of sound in a material is directly proportional to its density.
