NCERT Class 9 Science Chapter 11 Sound Solutions
NCERT Class 9 Science Chapter 11 Sound Solutions GENERAL SCIENCE TEXTUAL QUESTIONS AND ANSWERS INTEX QUESTIONS AND ANSWERS Textbook Page No. 162 1. How does the sound produced by a vibrating object in a medium reach your ear? Ans. When an object vibrates, it forces the neighbouring particles of the medium to vibrate. These vibrating particles then force the particles adjacent to them to vibrate. In this way vibrations produced by an object are transferred till it reaches the ear. Textbook Page No. 163 1. Explain how sound is produced by your school bell. Ans. When the school bell is struck with a hammer, the hammer hits the gong again and again that causes compressions and rarefactions in the air. These vibrations travel in the air in the form it starts vibrating and as a result sound is produced in the bell. 2. Why are sound waves called mechanical waves? Ans. Sound waves are classed as mechanical waves because they pass through a physical medium such as air, liquids ...