why does a lump of cotton wool shrink in water?
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A lump of cotton wool has a lot of air trapped inside the space present in its fibres. When this lump of cotton is immersed in water, all the air is replaced by water. Due to this the cotton lump shrinks down.
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A lump of cotton wool has a lot of air trapped inside the space present in its fibres. When this lump of cotton is immersed in water, all the air is replaced by water. Due to this the cotton lump shrinks down.
Lump of cotton wool has gaps of cotton fibres which are filled with air. When water replaces the air from these gaps, the cotton lump becomes heavy and shrinks due to removal of air gaps
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