Geography, asked by akhil9880, 1 year ago

why does a black metal ring to fix it on a cart wheel

Answers

Answered by vishal123kumar

Explanation:

Metals expand on heating and contract on cooling. This expansion and contraction of a metal is a reversible change. The metallic rim used is slightly smaller in diameter than the wheels .On heating the rim expands. ... When the rim cools, it contract and press tightly on to the wheels.

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