*QF5. A straight smooth pipe has a diameter 100 mm and length 60 m and is inclined at 10 to the horizontal. A liquid of density 900 kg/m3and kinematic viscosity 120 mm2/s is to be pumped through it into a reservoir at the top end, where the gauge pressure is 120 kPa. Using a force balance argument, determine (a) the maximum pressure at the pipe inlet if the mean shear stress on the pipe walls is not to exceed 200 Pa; (b) the corresponding rate of flow, by rearranging the pressure loss equation to obtain an expression for . Take the friction factors as = 64 for laminar flow and = 0.32 for turbulent flow. why is velocity at the bottom of the pipe neglected