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Grade 12Engineering Entrance Exams

A sheet can be made water proof by coating it with a substance that changes the angle of contact (a) To ^/2 (b) To zero (c) From acute to obtuse (d) From obtuse to acute

Profile image of Abhishek
12 Years agoGrade 12
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2 Answers

Profile image of Saurabh Koranglekar
6 Years ago

If the clothes are sprayed with waterproofing agent, then itchanges the angle of contact from acute to obtuse, in this way, water beads up on the surface and does not easily penetrate the clothing.
Profile image of Vikas TU
6 Years ago
If the clothes are sprayed with waterproofing agent, then it changes the  angle of contact from acute to obtuse, in this way, water beads up on the surface and does not easily penetrate the clothing. 

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