Question

a waterproofing agent changes angle of contact from​

Answer 1

Explanation:

raincoat is the waterproof agent

Answer 2

Answer:

If mercury is taken in a glass vessel, the free surface of mercury near the walls is convex upwards. When the liquid is in contact with solid, the angle between the solid surface and the tangent to the free surface of liquid at the point ofcontact, measured from inside the liquid is called the angle of contact