Advertisements
Advertisements
प्रश्न
State three conditions necessary for hearing sound.
Advertisements
उत्तर
Necessary conditions for hearing a sound:
- There must be a vibrating body, capable of transferring its energy to its surroundings.
- These must be a material medium to pick the energy and then propagate it in a forward direction.
- There must be a receiver, so as to receive the sound vibrations and then transmit them to the brain for final interpretation, such as the human ear.
APPEARS IN
संबंधित प्रश्न
Fill in the blank.
The number of times a body vibrates in one second is called its ______.
Select the correct alternative :
We can distinguish a shrill sound from a flat sound by its
An observer X is on an island 5500 m from a vertical cliff on the shore. A ship Y is anchored between the island and the Cliff. A blast on the ship’s siren is heard twice by X, the interval being 5s. [Velocity of sound = 330 ms−1]
(i) Find the distance of the ship from the island.
(i) Find the distance of the cliff from the ship.
Select the correct option:
The longitudinal waves can propagate only in
Select the correct option:
If the frequency of a wave is 25 Hz. the total number of compressions and rarefactions passing through a point in 1 second is :
The smoke from the gun barrel is seen 2 second before the explosion is heard. If the speed of sound in air is 350 ms-1, calculate the distance of observer from the gun.
A person hearing at one end of a long metal bar hears two distinct sounds when the other end is struck with a stone. Explain, giving scientific reasons
Define one hertz.
