the law of laminar flow calculates the velocity (speed) of blood flowing through any blood vessel at any given location within the vein using the equation V=F (R^2 - d^2), because of friction at the walls of a blood vessel, the velocity V, of the blood is greatest in the center of the vein and decreases as the blood flow distance d, increases from the center. If the viscous resistance force F, is 18500, and the blood vessel radius R, is 0.008 cm, what is the blood velocity where the blood flow distance is .002 from the center of the vessel?