Question: The relationship between v and r is given by the pressure difference between the ends of the tube. If P and L are constant, then

The relationship between v and r is given by the pressure difference between the ends of the tube. If P and L are constant, then v is a function of r. In a typical human artery, the values are n =027, R =.008cm, L =2cm and P =4000 dynes/cm^2. Find the rate of change of v with respect to r when r =.005cm
v = P/4nL (R^2- r^2)

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