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Why does water form a dome on a dirty surface?

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2013-05-11 23:47:37

Water does not particularly want to form a dome, or it would be

better to say, form a droplet, on a dirty surface.

See related questions below.

Water forms droplets when the cohesion of water with itself is

larger than the adhesion of water to the surface.

A dirt surface cold be anything; hydrophobic or hydrophilic,

soluble or insoluble, rough or smooth, hot or cold.

All these things matter.

See links below.


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