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2.4. Syringe pump Suppose that a laboratory experiment requires that an aqueous solution be delivered to an open container at a constant flow rate of 100l/min for 30min. A syringe pump is available, which has a motor and gear drive that will advance the plunger of any syringe at a set speed. As shown in Eig. P2.4, the syringe diameter is Ds and the pusher speed is Us. The syringe will be connected to plastic tubing with a length L=50cm and a diameter D=0.86mm. There may be a height difference between the ends of the tubing. A syringe size must be chosen. Figure P2.4 Syringe pump. (a) According to the pump manufacturer, Us can be controlled from 0.08 to 80mm/min. Three syringe sizes available in the particular lab are 1ml(Ds =4.8mm),5ml(Ds=12.1mm), and 50ml(Ds=26.7mm). Which would be best? (b) If the tubing inlet and outlet are at the same height, what will P be within the tubing? Will it be affected by the size of the syringe? (c) If the tubing outlet is raised by 10cm, what will the new P be