Talk:Continuity equation

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The continuity equation applies to more than just mass and charge. It applies to any conserved property. This is the form of the conservation law derived from Noether's theorem. IMO The article should be changed somewhat to reflect this. 63.205.41.128 03:23, 31 Jan 2004 (UTC)

\frac{\partial \varphi}{\partial t} + \nabla \cdot f = s

should use the substantial derivative:\frac{D\varphi}{Dt} + \nabla \cdot f = s

No! It should be the partial derivative, as on the Navier Stokes page and as in the derivation of the Maxwell case. I have changed this back. Paul Matthews (talk) 17:52, 1 February 2008 (UTC)

[edit] INTEGRAL'S FORM

May your describe the integral's form?*

[edit] Derivation

When the article talks about Ampère's law as one of Maxwell's equations, it should be noted that the formula given given includes Maxwell's correction. —Preceding unsigned comment added by Iain marcuson (talk • contribs) 19:31, 21 October 2007 (UTC)