Question

Give two illustrations of thermal expansion in day-to-day life.

Answer 1

$1)$ When you want to open a tight jar, it is recommended that you run it under hot water. This expands the lid ever so slightly to relieve all the stress and friction and the jar opens up easily.

$2)$ Train tracks are put in pieces and you can notice a small gap between them. You can hear that gap in the train’s rhythm. The gap is to make it easy for the tracks to expand and contract without putting undue stress on each other.