Calculating h for Blood Transfusion Needle

[Dr.Wasim]

Homework Statement

A patient is to be given a blood transfusion. If the inside diameter of the 4.0 cm long
needle is 0.40 mm, the blood pressure in the arm is 2400 Pa, and the required flow is 4.0
cm³/min, how high h should the bottle be placed? (ρ = 1050 kg/m³, η =0.0040 Pa·s)

Homework Equations

I don't know how to do this question

please help me through " Poisieulles' equation " only

Best Wishes for you

 

[tiny-tim]

Hi Dr.Wasim!

Poiseuille's equation is change in pressure = 8ηLQ/πr⁴ …
see http://en.wikipedia.org/wiki/Poiseuille%27s_law" for details.

Show us what you get. ​