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प्रश्न
How does a water proofing agent work?
लघु उत्तरीय
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उत्तर
The affinity between a surface and water determines its wettability and ability to absorb water. When a liquid has an acute contact angle with a surface, it will wet it. Waterproofing coatings have an obtuse angle of contact, resulting in hydrophobic surfaces.
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