(Solved): SAE 30 oil at \( 20^{\circ} \mathrm{C} \) flows in the 3-cm-diameter pipe in the figure below, whi ...

SAE 30 oil at \( 20^{\circ} \mathrm{C} \) flows in the 3-cm-diameter pipe in the figure below, which slopes at \( 37^{\circ} \). For the pressure measurements shown, determine \( (a) \) whether the flow is up or down and \( (b) \) the flow rate in \( \mathrm{m}^{3} / \mathrm{hr} \). Be sure to list all the relevant assumptions and show all of your work.