The volume flow rate in an artery that supplies blood to the brain is 3.5 x 10 -6 m 3 /s. If the cross-sectional area of the artery is 8.

The volume flow rate in an artery that supplies blood to the brain is 3.5 x 10-6 m3/s. If the cross-sectional area of the artery is 8.5 x 10-5 m2, what is the average speed of the blood through this vessel? Find the average blood speed through a narrowed section of the artery where the cross-sectional area is reduced by a factor of 3.