A 3 cm long needle at the bottom of a tube connected to an IV bag...

 

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A 3 cm long needle at the bottom of a tube connected to an IV bag is used to inject saline solution located a height h above the needle. The viscosity of the saline solution is 1.1 mPas and its density is 970 kg/m. A. The pressure at the top of the saline solution is equal to atmospheric pressure. Compute the gauge pressure of the saline where it enters the needle, a distance of h = 0.7 m below the top of the solution as shown. You may assume that the fluid is effectively stationary here, so you can use the hydrostatic pressure equation. A 3 cm long needle at the bottom of a tube connected to an IV bag is used to inject saline solution located a height h above the needle. The viscosity of the saline solution is 1.1 mPas and its density is 970 kg/m. A. The pressure at the top of the saline solution is equal to atmospheric pressure. Compute the gauge pressure of the saline where it enters the needle, a distance of h = 0.7 m below the top of the solution as shown. You may assume that the fluid is effectively stationary here, so you can use the hydrostatic pressure equation.