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JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER
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Robin wants to shove rubber pipe up a plastic tap. The problem is that the pipe's diameter is smaller than that required to secure a tight fit. So Robin switches on a halfdryer on and pointed it towards the pipe. He found that now the pipe fitted in easily. Why is this so?
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Correct option: A
The pipe expanded due to the hot air, and then contracted back again.
Option A (The pipe expanded due to the hot air, and then contracted back again.) is correct because heating the rubber pipe caused it to expand, allowing it to fit over the tap, and it then contracted upon cooling.
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