1. Given two rectangular ducts with equal cross-sectional area, but different aspect ratios (width/height) of 2 and 4, which will have the greater frictional losses? Explain your answer. A viscous oil with a specific gravity SG = 0.85 and a viscosity of 0.10 Pa · s flows from tank A to tank B through the six rectangular slots indicated in Fig. P8.68. If the total flowrate is 30 mm3 /s and minor losses are negligible, determine the pressure in tank A.