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10. A steel needle, when placed carefully on water, can be made to float. When a detergent is added to the water, it sinks. Explain this observation. (2 marks)



Answer :

GinnyAnswer

Final answer:

Steel needle floats on water due to surface tension and cohesion, sinking when detergent is added.


Explanation:

When a steel needle is carefully placed on water, it floats due to surface tension and cohesion of water molecules. Despite steel being denser than water, the molecular forces at the surface of the water allow the needle to remain afloat. Adding detergent disrupts the surface tension, causing the needle to sink.


Learn more about Surface Tension and Cohesion here:

https://brainly.com/question/28728021


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