User talk:Yadevol

Density
I put the formal definition section of the density page back in. The scales on the axes are what make it dimensionally correct. It looks weird, but I derived it both with the chain rule and also by writing an elemental volume and I tested it against a few different mass functions, it seems to work. I've fixed it up a bit so that it's easier to read, and I took out the time dependent bit because I admit it makes it more confusing, and I really can't explain what dV/dt is (comes from the chain rule, but if I can't make sense of it I shouldn't have put it in). I think it's necessary to have this information because I kind of needed that relation for project, couldn't find it, derived it myself, and whenever I do that I edit wikipedia. The problem is that the usual m/V doesn't say anything about nonhomogeneous matter, so the more generic definition (dm/dV) is important.

I'll check this talk page in case there's any trouble...

(day later, sorry didn't sign) You know what? It's not working. The mass functions I used to test it were flawed and happened to give the right density. I've removed it myself until fixed. Sorry for being a smartass. -Ben pcc 16:53, 27 March 2007 (UTC)

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&mdash; Objectivesea (talk) 00:43, 17 January 2008 (UTC)

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