1. I don't know how to do this question :

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)

Relevant equations

Best Wishes for you

2.

3. Originally Posted by Dr.wasim
I don't know how to do this question :

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)

Relevant equations

Best Wishes for you
Really it's just a plug and chug.

Where are you having trouble? Is it in converting change in pressure to height?

Think about the relationship between liquid height, h and Pressure.

4. ok

now i found Delta P from Poisieulles' equation

then found P2 = P1 + Delta P

then P2 = rho * g * h

h = P2 \ rho * g

is this true solution ?

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