Question

why does a lump of cotton wool shrink in water​

Answer 1

Explanation:

Cotton balls only float while is air trapped between the fibres. ... When all the air has been replaced by water, the cotton ball sinks. Cotton balls sink faster in hot or soapy water because both wet the cotton fibres and replace the air trapped between them much faster than pure cold water.

Answer 2

Answer:

here is answer

Explanation:

cotton is lighter and have less density so it float on water but wool have more density