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A drop of oil placed on …

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A drop of oil placed on the surface of water spreads out but a drop of water placed on oil contracts. Why?

Posted by Simran Birdi 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Kartik Singh 5 years, 8 months ago

It is because of the COHESIVE force between the particles of oil,which attracts its own molecules........whereas in case of water COHESIVE force is less and the force which is dominant here is called ADHESIVE force in this type of force.... the force of attraction between the molecules of different substances(water and surface) is more...

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