Oil \((S G=0.9)\) flows downward through a vertical pipe contraction as shown in Fig. P5.97. If the mercury manometer reading, \(h\), is \(100 \mathrm{~mm}\), determine the volume flowrate for frictionless flow. Is the actual flowrate more or less than the frictionless value? Explain.

Figure P5.97

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0.6 m 17 T 100 mm 300 mm