9. (18 Marks) The branching of a blood vessel is shown. Blood at a pressure of 140 mm Hg flows in the main vessel at 4.5 L/min. Estimate the blood pressure in each branch, if vessels behave as rigid tubes, that we have frictionless flow, and that vessel lies in the horizontal plane. What is the force generated at the branch by the blood? You may approximate blood to have a density of 1060 kg/m. 45 D3=3 mm 60 Q2 = 2 L/min D = 1 cm D = 5 mm 2 = 4.5 L/min P1 = 140 mm Hg 3