NCERT VI Social Sciences
Why does a lump of cotton wool shrink in water?
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1
Cotton (and wool, silk, etc.) swell up when they come in contact with water because they absorb water. They subsequently shrink when the water is removed from them.
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a lump of cotton wool will shrink in water because it observe large amount of water than any other fibers as well as wool takes more time to get dried up.
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