The velocity v of blood that flows in a blood vessel with radius R and length L at a distance r from the central axis is -4 (R²-2) v(r) = where P is the pressure difference between the ends of the vessel and n is the viscosity of the blood (See Example.). Find the average velocity (with respect to r) over the interval 0 s r s R. (Use eta for . Use capital P for Pressure.) Vave Compare the average velocity Vave with the maximum velocity Vmax Vave= Vmax

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