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why does a greased needle float in water?

why does a greased needle float in water?

Grade:12th pass

1 Answers

Yugabrat Gogoi
47 Points
7 years ago
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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