Water fl owing in a smooth 6-cm-diameter pipe entersa venturi contraction with a throat diameter of 3 cm.Upstream pressure is 120 kPa. If cavitation occurs in thethroat at a fl ow rate of 155 gal/min, what is the estimatedfl uid vapor pressure, assuming ideal frictionless fl ow?( a ) 6 kPa, ( b ) 12 kPa, ( c ) 24 kPa, ( d ) 31 kPa, ( e ) 52 kPa

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