It is desired to know the efficiency of a dialysis machine that is intended to be used in hospitals to eliminate the toxins present in the body of patients with kidney failure. The dialysis machine has a total length of 5 m, with a diameter of 0.45 cm and a real power of 0.2 W. The flow and density of the blood is 500 ml/min and 1.06 g/ml. Consider the 4 elbows of the hose of the 180 return type, two 90 elbows, two inlets and a height of 60 cm from the hauta vein inlet to the dialysis machine and the patient's blood pressure is 120/80 mmHg