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| 1. |
Why water with detergents dissolved in it have small angle of contact? |
| Answer» EXPLANATION:Water with DETERGENT dissolved in it has small angles of CONTACT (θ). This is because for a smallθ, there is a fast capillary rise of the detergent in the cloth. The capillary rise of a LIQUID is directly PROPORTIONAL to the cosine of the angle of contact (θ). | |