p + qv2/2 + qgy = constant
where p is the pressure, q is the density, v the velocity and y the height in a gravitational field of strength g, all measured at the same point. This quantity is then constant throughout the fluid.
Bernoulli's principle is used for, but not essential to, lift by airplanes.
Also Known As: Bernoulli’s Principle
Common Misspellings: Bernouli’s Law, Bernulli’s Law, Bernolli’s Law, Bernoulis Law, Bernullis Law, Bernollis Law
Examples: A special case of the Bernoulli equation is when the height of the flow remains constant. i.e. the third term disappears from the equation. This reduced form shows that if the pressure in a fluid decreases, the flow will accelerate and vice-versa. The Bernoulli family have made many contributions to science and mathematics, including probability theory.