84This formula is known as Poiseuilles formula.This is applicable under the following conditions.1) The flow must be steady and laminar.2) The liquid in contact with the walls of the capillary tube must be at rest.3) The pressure at any cross-section of the capillary tube must be same.97. When a liquid is flowing through a tube, the velocity of the flow of a liquid at a distance x from the axis ofthe tube is given by V= [r 2 x2 ]4 lP .The velocity distribution curve of the advancing liquid in a tube is a parabola.98. Ohms law in fluid dynamics (Poiseuillis equation)a) The Poiseuillis formula Q=lPr84