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Take a metal dish, pour some water in it. Strike it at its edge with a spoon. Do you hear any sound? 

1. Again strike the dish and touch it. Can you feel the dish vibrating?

2. Strike the dish again. Look at the surface of water. Do you see any movement on the water surface?

3. Now, hold the dish. What change do you observe on the surface of water?

1 Answer

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We see that a vibrating object produces sound.

1. I can feel the dish vibrating.

2. I can see the waves on the surface of water.

3. I cannot see the waves on the surface of water.

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