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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

Abhishek , 11 Years ago
Grade 12
anser 2 Answers
Saurabh Koranglekar

Last Activity: 5 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.

Vikas TU

Last Activity: 5 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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