An incompressible fluid flows steadily in the entrance region of a circular tube ofradius R =75 mm. The flow rate is Q=0:1m3=s. Find the uniform velocity U1 at theentrance. The velocity distribution at a section downstream is \frac{u}{u_{\max }}=1-\left(\frac{r}{R}\right)^{2} Evaluate the maximum velocity at the downstream section. Calculate the pressure drop that would exist in the channel if viscous friction at the walls could be neglected.