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fonseh

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## Homework Statement

How to show that the dE/dy = 0 , yc will become (Q^2 / g)^1/3 ?

http://www.brighthubengineering.com...nnel-flow-basics-2-supercritical-flow/#imgn_0

## Homework Equations

## The Attempt at a Solution

E = y + (V^2) /2g , dE / dy = 1 ... why yc will become (Q^2 / g)^1/3 ?[/B]