Reassuring to read excellently educated scientists talk about hypo(thetical) items using other hypo(thetical) names to explain the unexplainables. The outstanding post came from Russell, who referred to theoretical texts of other scientists (the rest spoke for themselves) - however fell into the trap of the "famos" E=m.c^2 of which - reasonably - only the '^' makes sense (I take the '2' also as a human derived mathematical wonder in my agnosticism). Human ingenuity built up a system (called 'Nature') that WORKS, in view of it's own right, technology is applicable, we live in some 'civilized' ways and have food etc. from the perceived 'natural' resources. Just do not ask "WHAT IS ENERGY"?
(BTW I was careless lately to volunteer a solution to that - do not argue FOR it though - it comes with my hypothesis of the proto-world - the Entirety - in which everything (literally) coincides with everything in equilibrium with - well - everything. When such coincidence accumulates too many too similar items the equilibrium changes into 'complexity' what - in some cases - we call a UNIVERSE, (including this,our own one) with a tendency to return into the equilibrium state (reducing the complexity) by dissipation of the irregularly accumulated 'similars'. Such tendency is what I called (past tense) energy in our universe-system (physics). By the vision of 'physical' dissipation (e.g. black hole theory) the constituents of the 'universe(s)' return into the well equilibrated Entirety by such tendency - the universe-related denomination in our physics may be called 'energy'. It does not refer only to materialistically physical items since a complete imagintion of the Entirety is way above our head (and it's content). Please, don't ask me for similarly fantasy-laden explanations about 'mass','time' etc. Now I joined the line of the self-expressing posters (vs Russell's wisdom). John Mikes On Sun, Feb 14, 2016 at 5:46 PM, Russell Standish <[email protected]> wrote: > The best definition I've heard, which I ascribe to Vic Stenger, is > that it is what is conserved when a physical system is translated in > the time dimension. This comes from the Noether theorem. > > Of course, relativity changes this a bit, since there is no longer a > unique time dimension. In relativity, what is conserved is a 4-vector > when the system is translated in spacetime. Conventionally we call > that vector the "mass-energy-momentum" vector. The magnitude of that > vector is just the rest mass of the system, and that is an intrinsic > property of the system. E=mc^2 is just a famous equation referring to > the fact that components of a vector change when you change the > coordinate system (which depends on the observer) - much like the > width and height of a 2D object change into each other as you rotate > the x-y axes of the coordinate system. > > Cheers > > On Sun, Feb 14, 2016 at 09:34:09AM -0500, spudboy100 via Everything List > wrote: > > You know, I have never heard a decent definition of what energy is? I > learnt in grade school was that energy was the ability to do work. Yah! Now > that sounds really, scientific, not. I refined the definition, to be > "matter in motion." Anyone have a better definition? "It takes energy.." > > > > > > > > -----Original Message----- > > From: Terren Suydam <[email protected]> > > To: everything-list <[email protected]> > > Sent: Sat, Feb 13, 2016 9:47 pm > > Subject: Re: Gravitational Waves Detected By LIGO! > > > > > > > > Great, but what is the specific way in which mass is converted into the > energy required to produce gravitational waves? When planetary orbits > decay, kinetic energy is lost... No mass is converted. > > On Feb 13, 2016 1:20 PM, "John Clark" <[email protected]> wrote: > > > > > > On Sat, Feb 13, 2016 at 1:00 AM, Terren Suydam <[email protected]> > wrote: > > > > > > > > > > > > > > > Sure, but John said the black holes lost 3 solar masses, which was > converted into gravitational waves... how? Fusion and fission are easy > examples of mass to energy conversion - so what's the specific interaction > here according to theory? > > > > > > > > > > Einstein found in General Relativity a new law of nature, he said it > takes energy to make gravitational waves and that an accelerating mass > produces gravitational waves, just as Maxwell said a accelerating charged > particle makes a electromagnetic wave. Normally this effect is far too > small to be important and can be ignored, but when it's something as > massive as a black hole and its vibrating at almost the speed of light as > it tries to become spherical we now know that gravity waves can not be > ignored and Einstein was right. General Relativity has passed its most > stringent test yet and passed it with flying colors! > > > > John K Clark > > > > > > > > > > > > > > > > > > > > > > -- > > You received this message because you are subscribed to the Google > Groups "Everything List" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected]. > > To post to this group, send email to [email protected]. > > Visit this group at https://groups.google.com/group/everything-list. > > For more options, visit https://groups.google.com/d/optout. > > > > > > -- > > You received this message because you are subscribed to the Google > Groups "Everything List" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected]. > > To post to this group, send email to [email protected]. > > Visit this group at https://groups.google.com/group/everything-list. > > For more options, visit https://groups.google.com/d/optout. > > > > > > -- > > You received this message because you are subscribed to the Google > Groups "Everything List" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected]. > > To post to this group, send email to [email protected]. > > Visit this group at https://groups.google.com/group/everything-list. > > For more options, visit https://groups.google.com/d/optout. > > -- > > > ---------------------------------------------------------------------------- > Dr Russell Standish Phone 0425 253119 (mobile) > Principal, High Performance Coders > Visiting Senior Research Fellow [email protected] > Economics, Kingston University http://www.hpcoders.com.au > > ---------------------------------------------------------------------------- > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/everything-list. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Everything List" group. 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