Torricelli's theorem of efflux.
It states that the velocity of efflux of liquid from an orifice at a certain depth in a tank is equal to the velocity of a body acquired in falling freely from the free surface of the liquid upto the orifice.
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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