What is angle of contact. Write the factors on which it depends. In which case it is acute and obtuse. Write examples for both cases.
Answers
Explanation:
the question is not enough correct
it is on the circle when tangent and radius intersect it is there. It is always 90 so never obtuse or acute . (. ❛ ᴗ ❛.)
Answer:
The contact angle is the angle, conventionally measured through the liquid, where a liquid–vapor interface meets a solid surface. It quantifies the wettability of a solid surface by a liquid via the Young equation.
Explanation:
Angle of Contact
Angle of contact is the angle at which a liquid interface meets a solid surface.
It is denoted by θ.
It is different at interfaces of different pairs of liquids and solids.
For example: - Droplet of water on louts leaf. The droplet of water(Liquid) is in contact with the solid surface which is leaf.
This liquid surface makes some angle with the solid surface.This angle is known as angle of contact.
Significance of Angle of Contact
Angle of contact determines whether a liquid will spread on the surface of a solid or it will form droplets on it.
If the Angle of contact is obtuse:then droplet will be formed.
If the Angle of contact is acute: then the water will spread.
Case1: When droplet is formed
Consider we have a solid surface, droplet of water which is liquid and air.
The solid liquid interface denoted by Ssl, solid air interface denoted by Ssaand liquid air interface denoted by Sla.
The angle which Ssl makes with Sla. It is greater than the 900.
Therefore droplet is formed.
Case 2: When water just spreads
The angle which liquid forms with solid surface is less than 900.