Define 1erg
Answer:-
Workdone is said to be one erg if a force of one dyne displaces the body through a distance of 1cm along the direction of force.
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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