Q9: A blacksmith heats a piece of iron till it becomes red hot and then beats it into a desired shape. What changes have taken palace in iron on heating
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Answer:
A blacksmith first heats a piece of iron till it becomes red hot. It then becomes soft and can be beaten into desired shape. Iron when heated and beaten it forms some shape and again heated it regain initial iron. Thus, this change is a reversiblechange.
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4
Answer:
A blacksmith first heats a piece of iron till it becomes red hot. It then becomes soft and can be beaten into desired shape. Iron when heated and beaten it forms some shape and again heated it regain initial iron. Thus, this change is a reversible change.
Explanation:
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