Question

Paheli had bought a new bottle of pickle from the market. She tried to open the metal cap to taste

it but could not do so. She then took a bowl of hot water and immersed the upper end of the bottle

in it for five minutes. She could easily open the bottle now. Can you give the reason for this?​

Answer 1

The metal lid expands at a faster rate than the glass jar, which forms a gap between the metal lid and the glass jar. This gap grows as the metal lid expands, until the lid pops open from the jar.