Grade 12th passMechanics
why does a greased needle float in water?
why does a greased needle float in water?
1 Answer
Yugabrat Gogoi
please find your answer below,
oil or fats float in water as they have low density. So, when a needle is greased with oil or fats, it floats. The question may arise that a needle sinks in water but why it starts to float? it is because the whole body of the needle is greased making it less dense than water.
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