"Hurt" here requires a context.
When you wear your wool jumper in the rain, you can dry the jumper and have no trace of 'hurt'.
If you agitate your wool jumper in hot water, it will shrink.
because if some one sits on them they would get hurt without the wool
Because if someone sits on them it will get hurt without the wool
the wool does not rust
Steel wool does not get softer under water. That is just your perception.
Cotton wool -- absorbent cotton -- absorbs water, and would not shrink.
Yes because the molecules of wool show hydrogen bonding with water molecules.
Because if someone sits on them it will get hurt without the wool
Don't know about warter, but wool does absorb water.
Wool is not soluble in water, but may dissolve in some acids.
Wool fibres attach to each other when wool is agitated in water. The fabric structure then, is very tight wool fibres.
Steel wool will quickly start to rust when placed in water due to its iron content. The water exposes the iron to oxygen in the air, leading to oxidation which causes the steel wool to rust and eventually deteriorate.
Sheep grow wool and it is shorn off. And no it doesn't hurt them.