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  #101  
Old 21-02-2016, 11:18 PM
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energy can NEVER be lost

NEVER!


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  #102  
Old 22-02-2016, 01:13 AM
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Quote:
Originally Posted by Eratosthenes View Post
energy can NEVER be lost

NEVER!


You are displaying an ignorance of General Relativity.

The conservation of energy is a Newtonian concept based on static space-time at non cosmological scales where objects move in space-time rather than carried along by space-time such as the recession velocity of galaxies.
In fact the recession velocity vs distance of galaxies even before the discovery of dark energy might have provided you with a valuable clue the conservation laws don't apply.
When space time is not static such as an expanding Universe or the passage of a gravitational wave, General Relativity is used.

Where as energy is conserved in Newtonian physics, energy-momentum is not necessarily conserved in General Relativity.
This has been known since the 1920s but requires a knowledge of tensor calculus in order to be understood.

In laymans terms if space time is not static the conservation of energy is not applicable.

Another obvious example is the cosmological redshift of photons.
This is an energy loss. Where do you think the energy goes?
Similarly GWs undergo energy loss at cosmological scales due to redshift.
At local scales GW energy loss is due to the work done on expanding/compressing matter.
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  #103  
Old 22-02-2016, 09:35 AM
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Bruce fails to comprehend the basics of thermodynamical principals and applies pseudo logical rationale to make a misinterpreted point concerning General Relativity....

and easy error to make, and often found in secondary school Physics classes

nevertheless it must be exposed as quackery in public in the name of science, truth, justice and the American way



Just because the equivalence of the integral form of “energy conservation” in relativistic FLAT SPACETIME breaks down when one tries to generalise it to curved spacetimes (ie General Relativity) doesnt imply that the laws of conservation of mass and energy have been violated. This break down does not occur if one expresses the energy conservation as a differential equation. (perhaps Bruce can explain that mathematical lunacy)
There are of course definitions of “energy” in GR that relates to a closed universe – a Hamiltonian – and this energy nicely and always works out to be ZERO.

In the end it depends on how one defines "energy" and how one defines "conservation" - even Bruce would understand and concede this elementary linguistic imperative

Definitions, definitions and assumptions…..we can all hide our ignorance and intellectual patheticness behind these…

a couple of excellent references for this sort of deranged Physics:

The renaissance of general relativity, in The New Physics (ed. Paul Davies) Clifford Will.

Seventeen Simple Lectures on General Relativity Theory Lecture 15 H. A. Buchdahl, (derives the energy-loss formula for the binary star, and criticizes the derivation)

classic Buchdahl, demonstrates the derivation and then critically dismantles its very essence - pity there arent many Scientists in the world today like Buchdahl - we mostly have puppets and circus clowns - scientific priests that read from their religious and dogmatic scriptures whilst wearing their pathetic lab coats and collecting their corporately owned state pay cheques.

Last edited by Eratosthenes; 22-02-2016 at 01:32 PM.
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  #104  
Old 22-02-2016, 12:39 PM
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Quote:
Originally Posted by sjastro View Post
You are displaying an ignorance of General Relativity.

The conservation of energy is a Newtonian concept based on static space-time at non cosmological scales where objects move in space-time rather than carried along by space-time such as the recession velocity of galaxies.
In fact the recession velocity vs distance of galaxies even before the discovery of dark energy might have provided you with a valuable clue the conservation laws don't apply.
When space time is not static such as an expanding Universe or the passage of a gravitational wave, General Relativity is used.

Where as energy is conserved in Newtonian physics, energy-momentum is not necessarily conserved in General Relativity.
This has been known since the 1920s but requires a knowledge of tensor calculus in order to be understood.

In laymans terms if space time is not static the conservation of energy is not applicable.

Another obvious example is the cosmological redshift of photons.
This is an energy loss. Where do you think the energy goes?
Similarly GWs undergo energy loss at cosmological scales due to redshift.
At local scales GW energy loss is due to the work done on expanding/compressing matter.
thanks very much for the insight - I hadn't taken this on board, even though I was well aware that redshift reduces photon energy (it never occurred to me to ask where it went).

I found this blog by a CalTech physicist that is clear enough for me to understand. http://www.preposterousuniverse.com/...not-conserved/

Last edited by Shiraz; 22-02-2016 at 01:07 PM.
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  #105  
Old 22-02-2016, 01:41 PM
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Quote:
Originally Posted by Eratosthenes View Post
Bruce fails to comprehend the basics of thermodynamical principals and applies pseudo logical rationale to make a misinterpreted point concerning General Relativity....

and easy error to make, and often found in secondary school Physics classes

nevertheless it must be exposed as quackery in public in the name of science, truth, justice and the American way

Your quote reminds of me of Benjamin Franklin's famous quote.
Quote:
“Tricks and treachery are the practice of fools that don't have brains enough to be honest.”
It is an exercise in word salad to create the impression of comprehension.

Its quite comical for you to invoke thermodynamics as a reason why energy cannot be lost because an effective argument as to why an expanding Universe does lose energy without going through the complications of GR is to use the first law of thermodynamics.

The first law states the energy change (dE) of a system is equal to the heat energy change minus the energy done by work on or by the system (-PdV).
dE = dQ -PdV

Where a system is the observable Universe, heat energy is conserved hence dQ=0.
Ignoring the presence of dark energy, photon pressure (P) in the Universe is positive and given the Universe expands dV increases and is always positive.
Hence dE is negative and indicates energy is being lost.

Quote:
Just because the equivalence of the integral form of “energy conservation” in relativistic FLAT SPACETIME breaks down when one tries to generalise it to curved spacetimes (ie General Relativity). This break down does not occur if one expresses the energy conservation as a differential equation.
There are of course definitions of “energy” in GR that relate to a closed university – a Hamiltonian – and this energy nicely and always works out to be ZERO.

In the end it depends on how one defines "energy" and how one defines "conservation" - even Bruce would understand and concede this elementary linguistic imperative
Who are you trying to kid?
Given you are incapable of understanding the energy loss using a very simple thermodynamic argument, you are now trying to con your way by selectively cutting and pasting comments with some minor editing from this link.
http://math.ucr.edu/home/baez/physic...energy_gr.html

It is dishonest to cherry pick selected passages given in the article.
All you have done is to fish around for various sentences that might have some vague connections to your prejudices. Strange how you have ignored the references to static Universe.....
It illustrates the article is way beyond your comprehension

Quote:
a couple of excellent references for this sort of deranged Physics:

The renaissance of general relativity, in The New Physics (ed. Paul Davies) Clifford Will.

Seventeen Simple Lectures on General Relativity Theory Lecture 15 H. A. Buchdahl, (derives the energy-loss formula for the binary star, and criticizes the derivation)

classic Buchdahl, demonstrates the derivation and then critically dismantles its very essence - pity there arent many Scientists in the world today like Buchdahl - we mostly have puppets and circus clowns - scientific priests that read from their religious and dogmatic scriptures whilst wearing their pathetic lab coats and collecting their corporately owned state pay cheques.
Cutting and pasting two of thirteen references from the link and "claiming" you are familiar with the works is highly suspicious.
Its up to you to show you are in fact familiar with Buchdahl and not just engaging in blatant lying.

There is no link I can find about Buchdahl's work, only a book is available.
Why don't you supply a scan of the book's cover since you have "obviously" read it.

Last edited by sjastro; 22-02-2016 at 03:48 PM.
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  #106  
Old 22-02-2016, 01:44 PM
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Originally Posted by Shiraz View Post
thanks very much for the insight - I hadn't taken this on board, even though I was well aware that redshift reduces photon energy (it never occurred to me to ask where it went).

I found this blog by a CalTech physicist that is clear enough for me to understand. http://www.preposterousuniverse.com/...not-conserved/
Thanks for the link Ray.
Sean Carroll gives an excellent description.

Regards

Steven
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  #107  
Old 22-02-2016, 03:22 PM
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Quote:
Originally Posted by Eratosthenes View Post
In the end it depends on how one defines "energy" and how one defines "conservation" - even Bruce would understand and concede this elementary linguistic imperative
Things did not end well for Ken Ham when he tried this on Bill Nye...
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  #108  
Old 22-02-2016, 05:42 PM
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Originally Posted by sjastro View Post
Cutting and pasting two of thirteen references from the link and "claiming" you are familiar with the works is highly suspicious.
Its up to you to show you are in fact familiar with Buchdahl and not just engaging in blatant lying.

There is no link I can find about Buchdahl's work, only a book is available.
Why don't you supply a scan of the book's cover since you have "obviously" read it.
So now you are doubting the great Buchdahl - a person of high respectability in the scientific community - and in particular the teaching of complex concepts to eager

I really cannot see how the citation of first year Thermodynamic principles and false Gibbs free energy equations will assist the superstition based sorcery that you are pedaling in here.

Its clear at least, that you owe xelas and Buchdahl a written apology.

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  #109  
Old 22-02-2016, 05:44 PM
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Things did not end well for Ken Ham when he tried this on Bill Nye...
so true Brett

but it appears, at least for some in this forum, that basic logic and common sense are not noble pursuits

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  #110  
Old 22-02-2016, 06:53 PM
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Originally Posted by Eratosthenes View Post
So now you are doubting the great Buchdahl - a person of high respectability in the scientific community - and in particular the teaching of complex concepts to eager
Quote:
Its clear at least, that you owe xelas and Buchdahl a written apology.
I can see how much you have been keeping up to date on the guy's work particularly his teaching to the eager.
Unfortunately he has been dead for over six years. He must teach via a medium.
I'll need the medium to apologize to him. At the same time I'll request his book "Seventeen Simple Lectures on General Relativity" for you as it is blindingly obvious you have absolutely no idea about his works.

Quote:
I really cannot see how the citation of first year Thermodynamic principles and false Gibbs free energy equations will assist the superstition based sorcery that you are pedaling in here.
Gibbs Free Energy is dG= dH- TdS.
Even someone who knows absolutely nothing about thermodynamics a casual glance between this equation and the first law dE = dQ -PdV indicates they are completely different.
The Gibbs free energy indicates whether a process such as a chemical reaction is favourable or not, or is in equilibrium.

Its ironical that ignorant people who try to hide their ignorance by throwing in "big" terms, like Gibbs free energy in this case, only make themselves look more ridiculous in the process.

Since you know more than any cosmologist or mathematician on the subject explain where the does the energy go when a photon undergoes cosmological redshift.
Better still contact the cosmologist Sean Carroll and refute his webpage.
http://www.preposterousuniverse.com/...not-conserved/

Last edited by sjastro; 22-02-2016 at 07:04 PM.
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  #111  
Old 22-02-2016, 08:58 PM
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Originally Posted by sjastro View Post
I can see how much you have been keeping up to date on the guy's work particularly his teaching to the eager.
Unfortunately he has been dead for over six years. He must teach via a medium.
I'll need the medium to apologize to him. At the same time I'll request his book "Seventeen Simple Lectures on General Relativity" for you as it is blindingly obvious you have absolutely no idea about his works.



Gibbs Free Energy is dG= dH- TdS.
Even someone who knows absolutely nothing about thermodynamics a casual glance between this equation and the first law dE = dQ -PdV indicates they are completely different.
The Gibbs free energy indicates whether a process such as a chemical reaction is favourable or not, or is in equilibrium.

Its ironical that ignorant people who try to hide their ignorance by throwing in "big" terms, like Gibbs free energy in this case, only make themselves look more ridiculous in the process.

Since you know more than any cosmologist or mathematician on the subject explain where the does the energy go when a photon undergoes cosmological redshift.
Better still contact the cosmologist Sean Carroll and refute his webpage.
http://www.preposterousuniverse.com/...not-conserved/
diversions will not assist you now.

All you have left is your ethical and moral responsibilities and your apology which is in arrears. And it must be unconditional and in writing.



(did you actually read my post? I said FAKE Gibbs Free energy - and just like clock work you fell into my little religious trap - You fundamentalist priests are all the same)
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  #112  
Old 22-02-2016, 09:36 PM
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Well... that thread turned to sh!t... what have you started Gary?
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  #113  
Old 22-02-2016, 10:33 PM
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No. Steven it putting up good stuff.
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  #114  
Old 22-02-2016, 11:04 PM
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what about Bruce?

The religion of science is holding strong even though its fundamentalist dogmatism is so fragile

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  #115  
Old 22-02-2016, 11:14 PM
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Well... that thread turned to sh!t... what have you started Gary?
yes, that was a pity eh!

Started out quite coherently as an expression of genuine excitement at a momentous scientific discovery and then got dragged down Alice's rabbit hole...Some really good information penetrated the haze though.

Last edited by Shiraz; 22-02-2016 at 11:33 PM.
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  #116  
Old 22-02-2016, 11:54 PM
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I am still trying to find out how someone can provide an equation to the FAKE Gibbs Free Energy, which apparently doesnt exist in this Universe, and then compare it directly to the first law of thermodynamics.

Perhaps there is a religious explanation to this incredible online analysis?

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  #117  
Old 23-02-2016, 06:54 AM
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Pardon my ignorance, but.. who is Bruce?
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  #118  
Old 23-02-2016, 09:08 AM
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Peter is playing the fool, there is no bruce.
He is trolling Steven and in an effort to insult Steven he seems to think calling him bruce is funny. It is insulting and poor behaviour from Peter. Probably breaches the tos
Peter has some sort of chip on his shoulder relating to science and scientists and he no doubt views Steven as fair game.

Given his rants I suggest he wants to divert attention away from the op.

The positive is although this site is relatively free of crank behaviour peter is here to remind us how tiresome crank behaviour is and how clever he is engaging in a battle of witts completely unarmed.

His rants need to be ignored as it is clear he is not interested in being decent.

Presumably peter has his reasons which hopefully he wont share with us.

I would encourage members to ignore peters rants for in time he may regret acting the fool...
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  #119  
Old 23-02-2016, 09:58 AM
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Peter is playing the fool...
I've got that part a long time ago...
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  #120  
Old 23-02-2016, 12:03 PM
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Perhaps there is a religious explanation to this incredible online analysis?

Very unlikely. In future, please consider conserving your own energy.
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