Question

(b)The iron rim on cooling decreases its size called________.

Answer 1

Answer:

contraction is your Answer

Explanation:

please mark my answer as brainelist

Answer 2

Answer:

On heating, metals undergo expansion and contract to their original size on cooling. ... On heating the metal rim, it expands and then it is fixed on to the wooden wheel. After cooling, metal rim contracts and gets fixed firmly to the wooden wheel. This is how a metal rim is fixed on a wooden wheel.