Question

​blood flows through main artery of area of cross section 2 cm^2 with a speed of 0.25m/s.If it branches into several capillaries of total area of cross section 0.4 m^2 , the average speed of blood through each capillary is?

Answer 1

Dear student,
Volume flow rate = $$\begin{gathered} Fromequationofcontinuty \\ \rho av=cons\tan t \\ \left(2\times {10}^{-2}\right)x0.25=0.4xv \\ averagevelocity=v=\frac{0.5\times {10}^{-2}}{0.4}=0.0125m/s \end{gathered}$$