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Practice each question, then open the answer or worked solution.
Explain how sound is produced by your school bell.
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.
Why are sound waves called mechanical waves?
Sound waves require a medium to propagate to interact with the particles present in them. Therefore, sound waves are called mechanical waves.
Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?
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.