Which of the following statements are true? I Sound is a form of energy. II Sound stops when vibration of an object stops. III Sound is not a wave. IV Sound travels better in a heavy gas than in a light gas. I and II I,II and III I,II and IV I and III
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Answer:
I and II
Explanation:
Sound is a form energy which can be created by the vibration objects
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Answer:
(i)The vibrating object sets the particles of the medium around it into vibration.
(ii)Since, sound is a mechanical wave ,it needs a material medium for its propagation and cannot travel through vacuum.
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