d=H=(rXv)m(Angular-Momentum)B dg F×1 ∑M=m(v20r2-0n1) The Angular-Momentum Equation p+ dp +gdz+dI V=0 p+dp V+d ++g21 P2+2+822 A+dA p+dp Frictionless incompressible Bernoulli equation k Streamline [ -2 sectiond r v dm    = =  H r v m z ( ) (Angular-Momentum) = =  The Angular-Momentum Equation ds Al  + d A+ dA V + dV p + dp 2 dp p +   p V A  z + gdz +VdV = 0 dp  g z c p V g z p V + + = + + 2 = 2 2 2 1 2 1 1  2  2 ( ) M m v2 r2 v1 r1 z  =  −  • Frictionless incompressible Bernoulli Equation * Streamline, !-2 section