A bag used for intravenous infusion (IV bag) contains a fluid with a density of

Question

A bag used for intravenous infusion (IV bag) contains a fluid with a density of 1.06 g/cm^3. The volume occupied by the 56 g of the fluid is 5.28^-5 m^3.

1. What is the gauge pressure in mm Hg (torr) in the tubing attached to the IV bag at a position 40 cm below the top of th ebag?

2. Suppose the tubing 40 cm below the top of the bag has a circular opening of diameter 2 mm. Assuming the fluid drips through the opening under the influence of the gauge pressure you found (Question 1) what is the net force on the exiting fluid (in Newtons)?

Explanation / Answer

1) dP = rho*V*g = 1.06*10^3*5.28*10^-5*9.81 = 549.046e?3 pascals

2) F= P*A = 549.046e?3*3.14*1*10^-6 = 1.724e?6 N

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