Q1 of 33 Page 174

What is sound and how is it produced?

Sound is a kind of energy produced in the form of waves. When anything is set to vibration, it produces sound.


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2

What is the range of frequencies associated with?

(a) Infrasound


(b) Ultrasound

 1

A submarine sends a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff?

 2

Why is sound wave called a longitudinal wave?

 3

Which characteristic of the sound helped you to identify your friend by his voice while sitting with others in a dark room?