The speed of sound, v, is not affected by a variation in the pressure of the gas, because:
Correct answer: C. Density is proportional to pressure
- A. Speed does not depend on pressure
- B. Speed does not depend on density
- C. Density is proportional to pressure
- D. None of the above
Explanation
The speed of sound in a gas is determined by the properties of the medium through which it propagates. In a gas, the speed of sound is primarily influenced by two factors: the density of the gas and the elasticity of the medium. However, the speed of sound is not directly affected by variations in pressure alone. In an ideal gas approximation, air pressure has no role to play in deciding the speed of sound because pressure and density both contribute to the velocity of sound equally and thus cancels each other out. Hence, Air pressure has no effect on sound speed.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Speed of Sound
The speed of sound depends on the properties of the medium, including its elasticity and density, and in gases it varies mainly with temperature. Questions connect speed with frequency and wavelength, compare sound in solids, liquids and gases, and distinguish the speed of propagation from the oscillating particles' motion.
Practise Waves
1,289 free Waves MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Speed of Sound questions
With increase in pressure, the speed of sound will:
The speed of sound in air does not depend on
The increase in the speed of sound in air for each degree rise above 0oC is
What is an echo of sound?
Which of the following frequency of sound waves is audible?
An ambulance siren emits a sound of frequency 1800 Hz. The speed of sound in air is 330 m/s. The ambulance moves towards a stationary observer at a constant speed of 50 m/s. What is the frequency heard by the observer?