Question
Question: Robin wants to shove rubber pipe up a plastic tap. The problem is that the pipe's diameter is smalle...
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 half-dryer on and pointed it towards the pipe. He found that now the pipe fitted in easily. Why is this so ?
A
The pipe expanded due to the hot air, and then contracted back again.
B
The tap got deformed because of the hot air.
C
The hot air caused adhesion between rubber and plastic.
D
None of the above.
Answer
The pipe expanded due to the hot air, and then contracted back again.
Explanation
Solution
Plastic tube expanded because of heat and then when one stopped applying heat, it contracted by cooling.