Q- A patient is to be given a blood transfusion. The blood is to flow through a wide tube from a raised bottle to a needle inserted in the vein. The inside diameter of the 3.8 cm long needle is 0.4 mm and the required flow rate is 4 cm3 of blood per minute. How high should the bottle be placed above the needle? Assume the blood pressure is 20 torr above atmospheric pressure. (Density of blood = 1.05*103 kg/m3 and its viscosity is 4*10-3 Pa.s)
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