The universe, energy etc
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You are quite correct. The one fact that could be stated is that as time progresses energy changes from a matter for to a EM form. Simply exemplified, coal gets burnt to produce light and heat.
Truth is the subjection of reality to an individuals perception
But if the actual amount of energy is the same. the light and heat must be able to convert back into matter w/o any extra energy somehow? otherwise it would imply that the coal contained more energy than the light and heat eg: materia gives light + heat but light + heat does not give materia or?
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Ok, here is one more ignorant thread from me :p As far as I understand, energy can never be destroyed, it can only change shape eg , it can become materia etc. So the total energy in the universe is always consant. Is that correct? In that case, Are things happening in the universe w/o actually consuming any "fuel" , it just changes state? So its all a big eternal state machine? Im sure Ive misinterpreted something, so can someone that actually attended their science classes explain this to me? :-)
Kind of but one theory goes that as the universe is constantly expanding eventually the energy content will be distributed so widely that entropy will start to set in and it will take more and more effort to generate the same amount of energy.
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But if the actual amount of energy is the same. the light and heat must be able to convert back into matter w/o any extra energy somehow? otherwise it would imply that the coal contained more energy than the light and heat eg: materia gives light + heat but light + heat does not give materia or?
The coal does contain more energy than it gives off ( and the oxygen that is part of the reaction when it burns also contains more energy ). The mass in the by-products can still be converted to energy ( e=mc^2 ).
Johan Lombaard Only two things are infinite, the universe and human stupidity, and I'm not sure about the former - Albert Einstein
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The coal does contain more energy than it gives off ( and the oxygen that is part of the reaction when it burns also contains more energy ). The mass in the by-products can still be converted to energy ( e=mc^2 ).
Johan Lombaard Only two things are infinite, the universe and human stupidity, and I'm not sure about the former - Albert Einstein
Yes ofcourse since you get ashes etc. but the total sum of energy in terms of heat , light and matter most be equal both before and after, otherwise the amount of energy in the universe would decrease.
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Ok, here is one more ignorant thread from me :p As far as I understand, energy can never be destroyed, it can only change shape eg , it can become materia etc. So the total energy in the universe is always consant. Is that correct? In that case, Are things happening in the universe w/o actually consuming any "fuel" , it just changes state? So its all a big eternal state machine? Im sure Ive misinterpreted something, so can someone that actually attended their science classes explain this to me? :-)
the universe has a constant amount of energy which is constantly changing into different forms of energy. eventually all energy will be changed unto the same type, most likely heat, and the universe will essentially be dead.
[Insert Witty Sig Here]
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Ok, here is one more ignorant thread from me :p As far as I understand, energy can never be destroyed, it can only change shape eg , it can become materia etc. So the total energy in the universe is always consant. Is that correct? In that case, Are things happening in the universe w/o actually consuming any "fuel" , it just changes state? So its all a big eternal state machine? Im sure Ive misinterpreted something, so can someone that actually attended their science classes explain this to me? :-)
You are correct. The universe started in thermal equilibrium at a very small size and very high energy. Gravity caused matter to clump up and the size of the universe has grown. That's why we have galaxies, starts and planets like we do now. Eventually the universe will reach thermal equilibrium again at a low energy state.
This blanket smells like ham
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But if the actual amount of energy is the same. the light and heat must be able to convert back into matter w/o any extra energy somehow? otherwise it would imply that the coal contained more energy than the light and heat eg: materia gives light + heat but light + heat does not give materia or?
Roger J wrote:
light + heat does not give materia
It will/does. The fusion of nuclei heavier than iron or nickel absorbs energy[^] You need ridiculous amounts of energy to create very little matter, though.
Cheers, विक्रम
And sleep will come, it comes to us all And some will fade and some will fall
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You are correct. The universe started in thermal equilibrium at a very small size and very high energy. Gravity caused matter to clump up and the size of the universe has grown. That's why we have galaxies, starts and planets like we do now. Eventually the universe will reach thermal equilibrium again at a low energy state.
This blanket smells like ham
Andy Brummer wrote:
The universe started in thermal equilibrium at a very small size and very high energy
Its not so surprising that people swallow GW theory so readially when they so firmly state what they have read from a book which is, in itself, pure speculation.
Truth is the subjection of reality to an individuals perception
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the universe has a constant amount of energy which is constantly changing into different forms of energy. eventually all energy will be changed unto the same type, most likely heat, and the universe will essentially be dead.
[Insert Witty Sig Here]
VonHagNDaz wrote:
most likely heat
Well there you go then - now we are all contributing to universal warming - we need a new task force! :laugh:
I'm pretty sure I would not like to live in a world in which I would never be offended. I am absolutely certain I don't want to live in a world in which you would never be offended. Dave
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Andy Brummer wrote:
The universe started in thermal equilibrium at a very small size and very high energy
Its not so surprising that people swallow GW theory so readially when they so firmly state what they have read from a book which is, in itself, pure speculation.
Truth is the subjection of reality to an individuals perception
You know, I actually thought about putting a little blurb in stating that it is according to the big bang theory, but I thought that it would just be an extra bit of data that would complicate things without adding any useful information. I also left out that gravity only magnifies produces local deviations from equilibrium and as a whole the universe itself is still in equilibrium. It's just that the scale of the deviation is going to decrease as time goes on. Also the latest data and theories also predict that the universe is expanding at an increasing rate and the eventual energy density of the universe is going to become vanishingly small. So, what are the acceptable methods for measuring distance between astronomical objects according to fat_boy? Also, I probably am more skeptical of GW then you think I am, but I do have fun every once in a while poking holes in your constant stream of GW crap. BTW. I've gotten a little bit more understanding of this stuff then just "what I've read from a book".
This blanket smells like ham
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You are quite correct. The one fact that could be stated is that as time progresses energy changes from a matter for to a EM form. Simply exemplified, coal gets burnt to produce light and heat.
Truth is the subjection of reality to an individuals perception
fat_boy wrote:
The one fact that could be stated is that as time progresses energy changes from a matter for to a EM form.
What are you basing that statement on? Very little of the matter that has been created will ever decay into photons. Electrons and protons are stable particles.
This blanket smells like ham
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But if the actual amount of energy is the same. the light and heat must be able to convert back into matter w/o any extra energy somehow? otherwise it would imply that the coal contained more energy than the light and heat eg: materia gives light + heat but light + heat does not give materia or?
The total energy of all the reactants before and after the reaction are the same. However the disorder of the system increased. Global disorder of systems always increases whenever there is a change. Chemical energy was converted into heat which has a higher level of entropy or disorder.
This blanket smells like ham
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Ok, here is one more ignorant thread from me :p As far as I understand, energy can never be destroyed, it can only change shape eg , it can become materia etc. So the total energy in the universe is always consant. Is that correct? In that case, Are things happening in the universe w/o actually consuming any "fuel" , it just changes state? So its all a big eternal state machine? Im sure Ive misinterpreted something, so can someone that actually attended their science classes explain this to me? :-)
I'd like to see proof on all the energy of the universe being constant. Sure it's been proven locally, but I mean how can we know for sure for sure?
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