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The fourth dimension
Pretty much.
I didn't want to do the whole thread, so only this post gets it.
1. Photons are gauge bosons, i.e., they are not matter. Photons are just a magnetic interaction carrier, they don't have matter properties at all. And they're very well understood by quantum physicists. Photons DO have dual properties, but it's as energy and waves, not energy and matter.
2. Right, sound cannot exist in space.
3. Humans possess the capabilities to currently accelerate particles to 99% light speed without all the energy in the Universe.
4. Photons are fully understood, and all forms of electromagnetic radiation are composed of them. There IS an upper limit to heat, you know.
5. I see what you mean.
Quote from Akar
1. Photons are strange things that have properties of both matter and energy. We do not understand them fully.
2. Yes, sound is simply vibrations traveling through matter. But how you would have sound in space eludes me, because despite what Hollywood depicts, there isn't any matter in the vacuum of space for sound waves to travel through.
3. Going the speed of light, according to Einstein's theory of special relativity, is impossible for matter. However, going near the speed of light is theoretically possible (say 99.9% of the speed of light), but would require a tremendous amount of energy (think all the energy in the universe together should do the trick).
4. As I have said before, photons (which is light), isn't fully understood. However, other forms of EM Radiation can travel at the speed of light (sound cannot, but if it were to travel through a ludicrously hot plasma [think 10^10000 degrees, that may be possible).
5. Umm... Well, this is the way science works like it or not. This is why it takes intelligent people to be physicists, because normal people can't even conceive what others have proven, let alone come up with their own ideas.
2. Yes, sound is simply vibrations traveling through matter. But how you would have sound in space eludes me, because despite what Hollywood depicts, there isn't any matter in the vacuum of space for sound waves to travel through.
3. Going the speed of light, according to Einstein's theory of special relativity, is impossible for matter. However, going near the speed of light is theoretically possible (say 99.9% of the speed of light), but would require a tremendous amount of energy (think all the energy in the universe together should do the trick).
4. As I have said before, photons (which is light), isn't fully understood. However, other forms of EM Radiation can travel at the speed of light (sound cannot, but if it were to travel through a ludicrously hot plasma [think 10^10000 degrees, that may be possible).
5. Umm... Well, this is the way science works like it or not. This is why it takes intelligent people to be physicists, because normal people can't even conceive what others have proven, let alone come up with their own ideas.
1. Photons are gauge bosons, i.e., they are not matter. Photons are just a magnetic interaction carrier, they don't have matter properties at all. And they're very well understood by quantum physicists. Photons DO have dual properties, but it's as energy and waves, not energy and matter.
2. Right, sound cannot exist in space.
3. Humans possess the capabilities to currently accelerate particles to 99% light speed without all the energy in the Universe.
4. Photons are fully understood, and all forms of electromagnetic radiation are composed of them. There IS an upper limit to heat, you know.
5. I see what you mean.
None.
Quote from Syphon
3. Humans possess the capabilities to currently accelerate particles to 99% light speed without all the energy in the Universe.
Quote from Syphon
There IS an upper limit to heat, you know.
None.
Quote from Minority
Quote from Syphon
3. Humans possess the capabilities to currently accelerate particles to 99% light speed without all the energy in the Universe.
You wouldn't stay a human anymore at 99% of c
For the tinyness of a proton, it takes a great amount of energy to get it to 99% of c. Now I don't know how many protons/neutrons (electrons would be neglectable) a human consists of, but that's quite a few. So getting a human close to c would require LOTS of energy. We can't even dream of that at this point of time.Quote from payne
Hmmm... that topic still on astrohpysic/physic theme, but leaved the main one : 4th dimension...
Oh well... I have some questions :
- Anyone could try to explain me well the Einstein's relativities theories (there's 2 I think)?
- I know NOTHING about Newtonian's law... any help please?
Oh well... I have some questions :
- Anyone could try to explain me well the Einstein's relativities theories (there's 2 I think)?
- I know NOTHING about Newtonian's law... any help please?
There is a reason why there are whole books about relativity. If you read this thread carefully, you will have heard about many effects predicted by relativity, like distortion of time and space.
Your 4th dimension is just another property of space.
I like to think that there are infinite arbitrary dimensions, but in our universe only a few play a role. I can't back this up with any theory; maybe there is some, but I wouldn't know of it. I don't know much more about this subject than what I learned at school so far...
So what exactly do you want to discuss about a fourth dimension?
Post has been edited 1 time(s), last time on Oct 13 2007, 10:09 am by spinesheath.
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Really? I thought it just stopped at absolute zero. What is this limit?
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:payne:
Humans have reached about 0,001 K wich is really near to the Absolute Zero.
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Humans have reached about 0,001 K wich is really near to the Absolute Zero.
Yes, we've come within thousands of a kelvin to absolute zero, but we can't push it any further, at least at the moment. If we were able to make matter achieve absolute zero, it would essentially implode because it would have no energy left in it, at all. It's something that would undoubtibly be used in bombs and other such warfare (if we could reach absolute zero), it's quite interesting.
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Quote from Dapperdan
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Humans have reached about 0,001 K wich is really near to the Absolute Zero.
Yes, we've come within thousands of a kelvin to absolute zero, but we can't push it any further, at least at the moment. If we were able to make matter achieve absolute zero, it would essentially implode because it would have no energy left in it, at all. It's something that would undoubtibly be used in bombs and other such warfare (if we could reach absolute zero), it's quite interesting.
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It isnt exactly useful, but the temperature of a singularity could approach infinity, because the volume approaches zero.
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For all we know, the heat inside a singularity could eventually cause an implosion, starting a new universe over again.
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For all we know, the singularity could be where the unicorns live.
Seriously horde, what is the point of speculating on that kind of stuff before you understand where and why the current physics models break down?
Seriously horde, what is the point of speculating on that kind of stuff before you understand where and why the current physics models break down?
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Hmm... I've always been interested in knowing exactly how our physics models "break down". What is so broken about them?
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If you were to calculate the density of a singularity with normal physics, you would basically be dividing by a volume of zero.
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Ah. I don't think the universe should be letting this happen. Maybe it just has a really small volume. Like being held up by quark degeneracy pressure or something.
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I know that current physics models break down at the singularity. The universe is an imploded singularity. For all we know, it is impossible to know what happens there, so speculation can suffice.
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So I'm guessing you'd have to take away infinite energy to make an object to absolute zero eh?
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:payne:
Well... let's just say it's theorically impossible : reaching the absolute zero would simply mean that the matter would have a volume of 0, as explained upper...
And why would it implode? Because there is no more pression into the matter because it has no more movment of particules in it?
And why would it implode? Because there is no more pression into the matter because it has no more movment of particules in it?
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That is wrong, with adiabatic compression, temperature increases, not decreases.
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I think payne was referring to Dapperdan's post where he said:
I don't think that would happen though, because if it did start to implode, the compression would raise the temperature and it would all balance out.
Quote from Dapperdan
If we were able to make matter achieve absolute zero, it would essentially implode because it would have no energy left in it, at all.
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no, reduction in temperature that much would be no different than a bose-einstein conensate, which has already been produced in the lab.
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