For fully turbulent flow of a Newtonian fluid in a circular pipe and moderate Re, the velocity profile can well—approximated by v/vmax = (1-r/R)(1/n) , with n=7. Calculate the ratio of the largest or peak fluid velocity to the cross-sectional average velocity. Which of the following numbers best represents that ratio?

MCQs on how fluids (gases and liquids and a few other materials) respond to forces, exert forces, and move from one place to another (their mechanics).