A glucose solution of viscosity 2.2 x 10-3 pascal-second and of density 1.03 kg/L flows from elevated bag into a vein. The needle into the vein has a radius of 0.30 mm and is 2.0 cm long. All other tubes leading to the needle have much larger radii, and viscous forces in them can be ignored. The pressure in the vein is 1.0 kPa above atmospheric pressure. A) Calculate the gauge pressure needed at the entrance of the needle to maintain a flow rate of 0.10 mL/sec. B) to what elevation should the bag containing the glucose be raised to maintain this pressure at the needle?

A glucose solution of viscosity 2.2 x 10-3 pascal-second and of density 1.03 kg/L flows from elevated bag into a vein. The needle into the vein has a radius of 0.30 mm and is 2.0 cm long. All other tubes leading to the needle have much larger radii, and viscous forces in them can be ignored. The pressure in the vein is 1.0 kPa above atmospheric pressure. A) Calculate the gauge pressure needed at the entrance of the needle to maintain a flow rate of 0.10 mL/sec. B) to what elevation should the bag containing the glucose be raised to maintain this pressure at the needle?