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Surface tension occurs due to the tendency of liquid molecules to favor their own kind. Surface tension is important in fluid multiphase systems typically at small length and velocity

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How does the lowered surface tension of soapy water make it better for cleaning?

I've read a few other answers on similar questions that talk about the lower contact angle and lower surface tension with soapy water (compared to tap water), but nobody seems to mention how this make …
Tom Cawte's user avatar