What is Poisson's ratio ?
Answer:-
The ratio between the lateral strain and linear strain due to a given tensile or compressive stress, within the elastic limit is found to be a constant called Poisson's ratio for the material of the body.
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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