## Quick Reference

An equation that describes the conservation of energy in the steady flow of an ideal, frictionless, incompressible fluid. It states that: *p*_{1}/*p*_{2} + *gz* + (*v*^{2}/2) is constant along any stream line, where *p*_{1} is the fluid pressure, *p*_{2} is the mass density of the fluid, *v* is the fluid velocity, *g* is the acceleration due to gravity, and *z* is the vertical height above a datum level.

*Subjects:*
Ecology and Conservation — Earth Sciences and Geography.

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