2014 · Q119
A metal screw-top on a glass bottle which appears to be stuck could be opened by using the fact that
General KnowledgePhysics
- Athe metal expands more than the glass when both are heated
- Bthe metal and glass expand identically when heated
- Cthe metal shrinks when heated
- Dboth metal and glass shrink when cooled
Explanation
Heating makes the metal cap expand more than the glass, loosening it.