Question

Give reason for the following (a) iron rims are heated red hot before fixing them on cart wheels

Answer 1

Explanation:

they cheated because metal expands on heating so it can be malleable

Answer 2

Answer:

rims are heated red because the cart wheel is bigger in size than the iron rim . so to expand the iron rim it is heated red. after it get expands ,it is fixed on the rim and cold water is poured over it it so that it can contract again and get fixed on the rim

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