Poiseuille’s law remains valid as long as the fluid flow is laminar. For sufficiently high speed, however, the flow becomes turbulent, even if the fluid is moving through a smooth pipe with no restrictions. It is found experimentally that the flow is laminar as long as the Reynolds number Re is less than about 2000: Re = 2ῡR/η Here ῡ, p, and η are, respectively, the average speed, density, and viscosity of the fluid, and R is the radius of the pipe. Calculate the highest average speed that blood (p = 1060 kg/m3, η = 4.0 ×10-3 Pa s) could have and remain in laminar flow when it flows through the aorta (R = 8.0 × 10-3 m).