Chapter 11 Sound Questions-01
Question
1. How does the sound produced by a vibrating object in a medium reach your ear?
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Answer
When an object vibrates, it necessitates the surrounding particles of the medium to vibrate. The particles that are adjacent to vibrating particles are forced to vibrate. Hence, the sound produced by a vibrating object in a medium is transferred from particle to particle till it reaches your ear.
2. Explain how sound is produced by your school bell.
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Answer
When the school bell is hit with a hammer, it moves forward and backwards, producing compression and rarefaction due to vibrations. This is how sound is produced by the school bell.
3. Why are sound waves called mechanical waves?
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Answer
Sound waves require a medium to propagate to interact with the particles present in them. Therefore, sound waves are called mechanical waves.
4. Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?
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Answer
No. Sound waves require a medium to propagate. Due to the absence of an atmosphere on the moon and since sound cannot travel in a vacuum, I will not be able to hear any sound produced by my friend.
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