Question

why does a tightly fixed lid of a bottle come loose when kept under hot water​

Answer 1

Answer:

Opening a tightly sealed pickle-jar can be tricky. There is a logical Physics explanation why running it under hot water can make it easier to open. If we assume it is your average glass pickle-jar with a metal top than heating up the jar will loosen the lid because the metal conducts more heat than the glass.

Answer 2

A tightly fixed lid of a bottle come loose when kept under hot water​, because -

• First of all,this incident is only possible when the lid is made out of any kind of good heat conducting material. Eg. any kind of metal lid.

And,the body of the bottle is made out of any kind of bad heat conducting material. Eg. glass, plastic etc.

• Now,in the above mentioned conditions,when we dip the bottle in the hot water,the lid absorbs a greater amount of heat energy than the body of the bottle.

• And, that's why the lid of the bottle expands (expansion of material due to heat energy) a little more than the body of the bottle.

• For this expansion of the lid, it becomes loose.