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Take a metal ball and a metal ring of suitable diameter. Pass the metal ball through the ring.
You can observe that the metal ball can easily go through it.
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Now heat the metal ball and then try to pass it through the ring. What will happen?
When the ball is heated the atoms in the ball . They start and force each other . As a result takes place. That’s why the ball through the ring.
Keep the metal ball on the ring for some time.What will happen?
After some time, as the ball lost the heat energy to the surrounding it and it through the ring.
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