Chapter 7: Air Around Us

Q&A -Ask Doubts and Get Answers

Q
Air Around Us

Question:

Why does a lump of cotton wool shrink in water?

Answer:

A lump of wool has a lot of air that is trapped in the space between the fibers. When we immerse the wool in the water, the trapped air is replaced by water. That is why the lump of cotton wool shrinks in water.


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