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Spread some sawdust or mustard seed or s...

Spread some sawdust or mustard seed or send on the diaphragm of a table. Knock on the diaphragm lightly with a finger. What do you understand from these observations ?

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From the above observations it is understood that the vibrations of an object produces sound.
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NAVNEET PUBLICATION-SOUND-QUESTION BANK
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  11. Fill in the blanks with the proper words : Noise pollution is a iss...

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  15. Write whether following statement are true or false. The wave of vib...

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