⇒ Physics

Sound

Class 9 Sound Notes

Sound Notes Sound:- Sound is a form of energy which produces a sensation of hearing in our ears. Vibration:- A kind of rapid to and fro motion of an object is called vibration. Sound is produced by vibrating objects. Wave:- A wave is a disturbance that moves through a medium when the particles of medium […]

Class 9 Sound Important Questions

Sound Important Questions What do you mean by the intensity of sound ? What is the S.I. unit of intensity of sound? Establish relationship between speed of sound, its wavelength and frequency. Write the factors on which the speed of sound depends upon. Waves of frequency 100 Hz are produced in a string as shown […]