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Re: [Phys-L] Bernoulli's equation

Not so tedious--

Consider the total external energy by taking the work done on the fluid (Fs), the KE (1/2mv^2), and the gravitational PE (mgH) and divide the sum of these by volume. The assumption is some small volume near the boundaries of the fluid. Fs/V = Fs/As = P while the masses become mass volume densities.

Rick

Richard W. Tarara
Professor of Physics
Saint Mary's College
Notre Dame, Indiana

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From: "Anthony Lapinski" <Anthony_Lapinski@pds.org>
Sent: Friday, January 25, 2013 11:36 AM
To: <phys-l@phys-l.org>
Subject: [Phys-L] Bernoulli's equation

Teaching fluids now. Is there an "easy/conceptual" way to teach/derive
Bernoulli's equation?

P + 0.5pv2 = pgh = constant

Using conservation of energy and other formulas, this is the most
tedious/complicated derivation. I'm just looking for a different approach.

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