Alex asked a blacksmith to make a metal cap for his grandfather's walking stick. After the cap was made, it has been observed that it should slightly be bigger to be attached to the walking stick. Provide Alex with a solution to his problem.

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Solution

Alex should heat the metal cap to fit it to the walking stick. Solids expand on heating and contract on cooling. If Alex heats the metal cap, it would fit well around the tip of the walking stick and as it cools down, the metal contracts there by fitting tightly to the stick.

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