Talk:History of energy

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List 2 advandages of using nuclear energy and 2 disadvantages of using nuclear energy

SolAlatus (talk) 00:04, 23 February 2010 (UTC) The link referring to Aristotle's book is broken, and the Bekker index is also wrong: The correct one is 1098a

This should be corrected. (I'm seemingly unable to do so and donÍt want to mess around.) THX SolAlatus (talk) 00:04, 23 February 2010 (UTC)

Concept of Tao[edit]

Strange that there's not a mention of the East Asian concept of Tao around Aristotle's nicomachean ethics mention.--ThePhantasos (talk) 13:35, 4 June 2010 (UTC)

Why? What's the connection, and why does it belong in the History of Energy article? · rodii · 19:22, 5 December 2010 (UTC)
Well, philosophically Taoism is possibly as relevant as nicomachean ethics in the sense that it was an earlier, if not initially folk, belief that there's a kind of 'energy' or as they call it 'qi' (at least in personal cultivation of it), that permeates the universe. Just wondering if anyone else agrees that it's worth an early mention? ThePhantasos (talk) 02:05, 25 August 2011 (UTC)

Noether's theorem[edit]

I was looking at the following statement:

In 1918 it was proved that the law of conservation of energy is the direct mathematical consequence of the translational symmetry of the quantity conjugate to energy, namely time.[citation needed] That is, energy is conserved because the laws of physics do not distinguish between different moments of time (see Noether's theorem).

It seems to me that to invoke Noether's Theorem as a proof of conservation of Energy is a rather circular argument. Noether's Theorem requires that the laws of motion be described the Euler-Lagrange equations from a Lagrangian, which in turn is equivalent to the laws of motion deriving from Hamilton's equations. But Hamilton's equations, if the Hamiltonian has no explicit time dependence, quickly lead to conservation of the Hamiltonian - and that is precisely conservation of energy. Surely this predates Noether's Theorem by quite a few years, doesn't it? — Preceding unsigned comment added by (talk) 22:02, 14 September 2013 (UTC)