Chapter 14, Problem 68P

GO Fresh water flows horizontally from pipe section 1 of cross-sectional area A₁ into pipe section 2 of cross-sectional area A₂. Figure 14-52 gives a plot of the pressure difference p₂ − p₁ versus the inverse area squared $A_1^{-2}$ that would be expected for a volume flow rate of a certain value if the water flow were laminar under all circumstances. The scale on the vertical axis is set by Δp_s = 300 kN/m². For the conditions of the figure, what are the values of (a) A₂ and (b) the volume flow rate?

Figure 14-52 Problem 68.