What is adhesive force ?
Answer:-
The force of attraction between the molecules of different substances are called adhesive force.e.g writing on blackboard by chalk is possible due to adhesive force between molecules of chalk and blackboard.
angle of contact.
It is defined as the angle between the tangent to the liquid surface at the point of contact and solid surface inside the liquid is called as angle of contact The value of angle of contact depends upon (i) Nature of solid and liquid in contact (ii) Cleanliness of the surface in contact (iii) Medium above the free surface of liquid
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