What is an echo of sound?
Correct answer: A. When sound reflects back
- A. When sound reflects back
- B. When sound gets absorbed
- C. When sound penetrates into objects
- D. All of these options are correct
Explanation
Echo is the sound heard after 'reflection from a distant obstacle after the original sound has ceased".
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
1,281 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
The speed of sound, v, is not affected by a variation in the pressure of the gas, because:
With increase in pressure, the speed of sound will:
The speed of sound in air does not depend on
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?
In gases, the speed of sound is inversely proportional to _ of the density when other factors are the same.