A bottle full of a liquid is fitted with a tight cork. Explain why a slight blow on the cork may be sufficient to break the bottle.

Explanation

If the bolw given to cork of area of cross-section a exerts a force F on cork, then increase in pressure on liquid is `=F//a`. Ac cording to Pascal's law, the increase in pressure at one part of liquid is communciated equally at all other parts of liquid. so the increase in force on the surface area A of the vessel is `F' = (F//a)A`. Since `A gt gt a`, so `F' gt gt F`. As a result of it,the bottle may break.