What is impulse ?
Answer:-
The impulse of a force may be defined as the product of the average force and the duration of impact.
I.e Impulse (I)=average force × time
I=Fdt or I=dp
dp=change in momentum
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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