Natural gas ( (ho=0.0044) slugs (/ mathrm{ft}^{3}) and (left.u=5.2 times 10^{-5} mathrm{ft}^{2} / mathrm{s} ight)) is pumped

Natural gas ( \(ho=0.0044\) slugs \(/ \mathrm{ft}^{3}\) and \(\left.u=5.2 \times 10^{-5} \mathrm{ft}^{2} / \mathrm{s}\right)\) is pumped through a horizontal 6-in.-diameter cast-iron pipe at a rate of \(800 \mathrm{lb} / \mathrm{hr}\). If the pressure at section (1) is \(50 \mathrm{psi}(\mathrm{abs})\), determine the pressure at section (2) 8 mi downstream if the flow is assumed incompressible. Is the incompressible assumption reasonable? Explain.