Performance curves of a model pump are shown. Find AH and 7m of a dynamically similar prototype pump if D: 1.2 m, Q = 1.3 m3/s and N = 1757 . Head coefficient Efficiency 0.3 90 0.25 80 gAH/N?D? 70 0.2 60 7m percent 50 gAH N D2 0.15 - 40 .1 30 - 20 0.05 10 0.001 0.002 0.003 0.004 0.005 Q flow coefficient ND3