pls help me I am in 7th class explain the diagram. pls
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i need clear photo this is not clear
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the ring and the ball are same size, in the first picture the ball is in warm so the ball enters the ring easily but in the second picture the ball is heated when things get heated materials will expand so the ball also expands so it doesn't fit the because when heated the ball size will increases so it doesn't fit the ring size
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