Question

When a shaving brush is taken out of water, it's hair cling together. Why?

Answer 1

The hair clings to the shaving brush when taken out of water because a thin layer of water forms on the hair.

Hence, when we get the brush out of the water hair clings to it because of surface tension.

Surface tension is a property of liquid where the surface area minimizes.

Answer 2

This is due to surface tension phenomenon.

When a shaving brush is taken out of water , it's hair cling together.

And they form a thin layer of all the hair.

This all is due to surface tension phenomenon.

Surface tension is defined as the tension which is the surface film of a Liquid caused by the attraction of the particles in the surface layer of the bulk of the liquid .
It leads to the minimise in the area .