write an activity to show that sound
needs a material medium for its propagation
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Answer:
take a school bell when you hits it with hammer it ptoduce sound
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Answer:
Bell-jar experiment demonstrates that sound needs a medium for its propagation. Take an electric bell and an air tight glass bell jar connected to a vacuum pump. Suspend the bell inside the jar, and press the switch of the bell. You will be able to hear the bell ring.
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