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A 3 cm long needle is used to inject a 0.3 L of a solution located...

A 3 cm long needle is used to inject a 0.3 L of a solution located 70 cm above a patient over a time of 25 minutes. Assume that the viscosity of this solution is 1.1 mPa⋅s and its density is 970kg/m3.

a) If the vein`s pressure is assumed to be at atmospheric pressure, what will be the difference in the input and output pressures across the needle in mmHg?

b) What is the flow rate of the solution in S.I. units?

c) What is the radius of this needle in cm?

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