On a cold day, it is hard to open the lid of a tight container. But when you gently heat the neck you can easily open the lid. why?
A. On heating glass expands and lid contracts
B. On heating lid expands more than the neck and thus slides easily
C. Neck becomes slippery on heating
D. Lid of the bottle cannot bear the heat.
Answer:B
On a cold day, it is hard to open the lid of a tight container. But when you gently heat the neck you can easily open the lid. why?
A. On heating glass expands and lid contracts B. On heating lid expands more than the neck and thus slides easily C. Neck becomes slippery on heating D. Lid of the bottle cannot bear the heat.