What is elastic collision ?
Answer:-
A collision is said to be an elastic collision if the sum of the kinetic energies of the particles after collision is same as the sum of kinetic energies before collision.
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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