For a liquid flowing through a packed bed spherical particle, the pressure drop across the bed is calculated using formula below (Ergun Equation). p=Dp2150vL3(1)2+Dp1.75(v)2L31 Where, v is the superficial liquid velocity (0.005m/s), is the bed porosity (0.5) and Dp is average particle size (0.001m), - density of liquid (1000kg/m3) and - viscosity of liquid (0.001kg/ms), particle density =2500kg/m3 and acceleration due to gravity g=9.81m/s2. Calculate the pressure per unit length of the bed for laminar flow