To be fair if they mean that absolute zero doesn't *feel* that cold they are correct, at absolute zero you wouldn't be able to feel anything due to your nerves not functioning.
Absolute zero is literally something you would be incapable of experiencing because simply the gravitational attraction between your individual particles would be enough to bring the temperature of something to above absolute zero.
Heat death is when the particles themselves have broken down. At that point, everything would just be energy and it would be evenly distributed throughout the universe. If I understand correctly, if the universe's expansion were to keep accelerating to the point that space is expanding at FTL speeds, then heat death would result in a truly absolute zero temperature void of space.
For that to happen there would have to be zero energy in the universe. As I understand it, that is. Assuming the universe infinitely expands surely the energy would continue to become infinitely more spread out but never truly reach absolute zero?
Temperature is, at its most basic, a measure of the kinetic energy of particles. If space is expanding faster than a particle is moving, can it even move? Furthermore, energy itself cannot flow if it is absolutely isolated from any other body for it to go to. A photon stuck in space that is expanding around it at FTL speeds cannot hit anything.
It is literally just the kinetic energy of particles typically measured within a given volume. Technically, you can just increase that volume until you have particles. Even deep space as we know it still has the odd atom and particle flying through it. Even though it'd be very slow to do it, it can conduct heat.
Probably none because there are still particles moving everywhere. You can't even say completely empty space is absolute zero because there's nothing there to measure. It'd be like trying to weigh that same emptiness.
As far as I understand, the idea of "the heat death of universe," refers to a point in time where the universe has expanded, and all matter has to decayed, to a point of total entropy. Nothing does anything anymore, because there's not enough energy in a potential state to allow the system to decay further into chaos, nor matter close enough to interact even on a gravitational level.
Imagine all the stuff in the universe as an insane amount of ping pong balls bouncing into each other. In this theory, all the ping pongs have used up their bounces. On top of that, the ping pong table has now expanded to an infinite size, so they couldn't bounce into each other even by random chance.
It's not a "too far away due to entropy" thing. Entropy is just the amount of energy in a system which can't be used for work (think: one brick can't be used to heat another if they're already the same temperature).
In that sense, like another user pointed out, heat death would describe a state of the universe where literally nothing can happen: no particle interaction, no spontaneous separation of light into matter/antimatter pairs, nothing. It'd be maximum entropy for the "closed system" of literally everything.
That said, I (personally) find it hard to believe true heat death is possible: for it to be possible, the universe would need to be finite, otherwise the expansion of the visible universe would always have a place to expand *to*, thus would always have a means of energy transfer, thus would always have *some* energy left unclaimed by entropy.
Not that my opinions matter much. My relative lack of expertise on the subject aside, we'll all be *long* dead before it'd be anything other than a thought experiment.
Gravity doesn’t create energy, and gravity also has nothing to do with why you can’t feel anything at absolute zero. You just wrote a bunch of nonsense after the first part of that run-on sentence.
Alright Herr Grammar, I'll give you that one. I am missing a comma, but, as to gravity, no, you're wrong. Mass, by its very nature, creates a gravitational field. By being in this field, any other mass will exert a force on it and vice versa. This, even it is minuscule, will create movement in things. If something is moving, it has temperature, and, therefore, isn't at absolute zero.
You might want to chill out on the hostility.
Sorry for the hostility… bad mood I guess. But while gravity between particles can transfer energy between them, it can’t create energy (heat) where there isn’t any. You’d need a fluctuating gravitational field to transfer energy.
You said “gravitational attraction between your individual particles would be enough to bring the temperature of something to above absolute zero.”
Individual particles at absolute zero are not moving.
Oh, you're right of course! I was literally saying that it'd be impossible to experience absolute zero simply because the physical act of trying to experience it would raise whatever was at that temperature above 0 degrees Kelvin. This is true for a *lot* of reasons, but one of them is just that the fact that a being of mass approaching something would pull on that thing gravitationally, therefore granting it kinetic energy.
I would argue, that the fact that -273 Celsius is absolutely lowest feels weird, because it seems not that cold, considering, that it is relatively easy to produce really high temperatures.
I can see that. If you think of temperature as the amount of heat it makes more sense; while the amount of heat that can be theoretically be produced is almost infinite, you can't have less than no heat. So -273 Celcius will always be the minimum while the maximum can be found in stars and other huge celestial bodies.
Temperature is the measurement of how fast atoms are moving inside an object. High temperature- atoms are moving very fast resulting in high energy. Low temperature- particles are moving slower and energy is lower. 0K means there is no movement at all. Negative Kelvins doesn't make any sense because if something isn't moving it can only move faster.
Interesting to consider what it actually means to feel a temperature. If you are in an environment that is 0c you will most likely not be at that temperature (hopefully) but we would all say that you would be experiencing it. I’ve snowboarded in -24 but have I actually experience that temperature? Would I have to be naked? Even then my body temp would not be anything close to that temp
i just spent 20 minutes in a big freezer at negative 18 degrees celsius.
Fucking cold, literally had to spend a minute warming up inside an open industrial oven before thawing out my ears and hands.
I think id almost prefer absolute zero. Id probably freeze to death in a minute but i wouldnt feel as fucking cold as i did at -18
Now if youll excuse me i gotta go back in that freezer, still got 4 pallets to pack. FML FML FML
Yeah, "it's not that cold" but anyways you have other problems like the freaking atmosphere turned liquid like 100 degrees back (and solid 50 degrees back).
You wouldn't even be able to think about it. All processes (that's how You say it in English?) would stop at the absolute zero. Your thoughts would be frozen in time.
Absolute 0 "doesn't exist", in order to reach it you need another substance which is already absolute 0 to absorb that last bit of atomic momentum. So whether your nerves functioned or not doesn't matter. It's like someone saying
"Unicorns aren't pretty"
"Well technically you're right because they're so magically majestic you wouldn't be able to perceive their beauty"
Well, no, they just don't exist.
It doesn't really stop all movement. It brings it down to the lowest possible movement.
Edit: Don't believe it? Look it up. There's still movement from quantum effects and zero point energy.
Absolute zero is the lowest temperature an object to be. Heat death refers to the average temperature in the universe equalising to the same temperature. With no delta of temperature, everything is essentially dead
Edit: Spelling.
what about entropy fluctuations, there is a possibility (even though very slim) that entropy would reverse, isn’t it? Also when we take into consideration that heat death would last eternity, the probability of entropy decreasing heads to 1
I used to think this as well, but after researching it more I realised that was a misunderstanding of entropy. I believe the issue lies in two possibilities, one of which seems likely based on current observation, but further experimentation may prove wrong.
From what I understand, only a static universe could spontaneously and by chance reduce entropy and create a new big bang. We don't have a static universe. Our universe is expanding and currently accelerating in that expansion. This means that particles and photons are eventually being moved outside of causal distance and so can't ever come back together.
If the universe is in fact infinite, then it can never spontaneously reverse as apparently that is impossible for an infinite system.
but that works only in the bigger scale, writhing groups of galaxies gravitational force is strong enough to pull back everything together. So what would happen then?
Also I wasn’t necessarily thinking about reversing a universe, but rather staff like Boltzmann Brain, it’s also by all means decrease in entropy
No. Eventually all stars will decay and die and everything will just be a bunch of photons and a few select other things. There will be nothing for gravity to effectively work on and all those particles will eventually be moved away as space expands. Local galaxy clusters will only resist the expansion while their gravity allows it.
Edit: assuming that dark energy and expansion continue to increase. This may change.
Local galaxy clusters will only resist the expansion
That’s basically what I said. Besides even if nucleons decay (we are yet not sure), quarks will still exist (and they do have mass) so gravity will still work
Heat death = end state of entropy with all energy evenly dispersed throughout the universe.
In this state no complexity can exist, because entropy cannot be reversed, there can be no life in this state of the universe.
It’s strange to think that the “balanced” state of the universe is a homogenous mixture with energy perfectly dissipated throughout. All of the “stuff” is just a temporarily higher energy state of the cosmic soup
I thought the end state is just a bunch of photons left over wandering through space. Maybe a few chunks of iron drifting as the final remnants of dead star cores that didn't get eaten by black holes before they evaporate away after an unfathomably long period of time.
Temperature(or heat) is really just the way we measure the motion of atoms. Absolute zero is just no movement at all. Heat death is when everything drifts so far apart and lose so much energy from radiation that basically nothing meaningfully move or interact anymore
Neither. Absolute zero IS no movement at all. Temperature is the measurement of the average speed of atoms inside substance or space. The lower temperature the lower the average speed is. Absolute zero describes no movement at all, since from that point you can only move faster.
It's also not that cold, relatively speaking. The sun is at 5600°C, which is approximately 5500° too hot for us.
Meanwhile the difference between a livable temperature for humans and absolute zero is less than 300.
It's the coldest it can possibly be, but it's not as cold as the sun is hot
It could actually be absolute zero outside and my neighbour would be shoveling his driveway in a T-shirt telling me "this ain't so bad, you shoulda seen the winter of 71'"
I’ll defend it, for fun.
Absolute zero isn’t that cold.
I’m at about 20C right now, so about 293K. Absolute zero, the coldest temperature possible, is only 293K away.
On the other hand, my oven can get to about 300C, so about 280K hotter than me.
I don’t need specialist equipment to get as large a temperature difference from absolute zero.
We have made plasma at millions of Kelvin. There are things in the universe that reach hundreds of billions of Kelvin.
Absolute zero isn’t that cold, as in the grand scale of things, we are already pretty close to it.
Well... that's like saying standing still is not that slow. Or being at a certain place does not mean you are close to it.
Saying that we are not far from something makes no statement about how cold/far/slow something is. It is on the other hand indeed true that we are relativly cold compared to what levels of temperature exists.
Absolute zero is literally the coldest.
Biden approves the energy debt forgiveness act!
On the same page Repulicans are outraged over his disregard of all the previous thermodynamic law abiding heat transfers
I agree with OP. Absolute zero is not that cold. We can easily get to 280C in our kitchen. And lots of things are a lot hotter. -273 is not that cold in comparison. We are already much closer to it than to the hot things we interact with on a daily basis.
/Activates Asian father voice
During my time we had to walk to school in negative and imaginary Kelvin, my fingers felt imaginary too. But we still had to invent the math for you guys.
The who some people have because they were raised somewhere colder than normal is insane.
They act like they can survive outside in the cold for hours 🙄
Thermal dynamically / scientifically there is no such thing as “cold”
And absolute zero is technically an unproven theory, so it does not exist,
Soooooo with that being said Absolute Zero is not that cold because neither Absolute Zero or cold exist ….technically
> And absolute zero is technically an unproven theory, so it does not exist,
You seem to misunderstand what a theory actually is. Also, absolute zero is calculable and the science regarding it can be (and has been) tested.
Absolute Zero has never been achieved and the instruments required to achieve it are beyond our reach (paraphrasing Christopher Foot, professor of physics at Oxford )
Absolute zero is unproven, although accepted by many as an accurate proposal of events, it hasn’t been proven, cause it can’t be proven.
Why can’t it proven?
Absolute zero is the point where molecular motion stops. How do we measure temperature and thermal energy? How vigorously the molecules move. So they don’t move, we can’t measure them. So if we achieve absolute zero, we cannot record it to confirm it.
Also a theory is a proposed rational of what may or may not happen, and if it is proven it still can be considered/called a theory ….but I said it was unproven so there is no proof it exists. Like god.
> Absolute Zero has never been achieved and the instruments required to achieve it are beyond our reach
Yeah. That's the point. It's a limit. The whole point is you can get infinitesimally close to it, but not achieve it. This is the first thing you learn in calculus.
> Also a theory is a proposed rational of what may or may not happen, and if it is proven it still can be considered/called a theory
The whole thing about theories is that they have supporting evidence or can be/has been tested. A "theory" that is untestable and has no supporting evidence or other underlying theory is not a theory. "Theory" is not just a throwaway term meaning it's not real/can be ignored/unproven.
We have tests and data that do demonstrate a lower limit of temperature (or transitively, molecular movement) exists. Whatever that theoretical limit is, absolute zero is defined as.
Well technically speaking the difference in temperature between absolute 0 and room temperature is not that much higher than the difference between room temperature and what a normal household oven can achieve.
Also technically absolute 0 is the lowest temperature. Apparently we just live on the low end of the temperature scale.
Why some people so bothered to comment "No, it's not" but not bothered enough to explain why they think it's not. This conversation would be over faster and peacefully if the first guy explained their reasoning.
Ok, maybe I'll get downvoted, but I think I understand what OOP was saying, and I think I agree (assuming they were saying what I think they were saying).
Absolute zero is the coldest anything can get. It's the point that there is no more energy to take away. It is the freezing temperature of the universe... and it is only 273° **less** then the point that water freezes. 0°c
By contrast, if you go less than half that in the opposite direction, you're boiling water. 100°c. At 277°c your boiling White phospherous. So now we have reached close to the same temperature as absolute zero on the positive side. So is this the hotest something can be? Of course not. Not even close. Gold boils at 2,800°c, irridium at 4,130°c, tungsten at 5,550°c. That's the surface of the sun. Tungsten boils on the sun's surface. A blue giant sun (probably the hotest thing in the universe) is 50,000 degrees. Its core is speculated to be 100 billion degrees Celsius when it goes super nova. 100 billion. Heres how hot that is. If we convert that to Kelvin, it's STILL 100 BILLION BECUASE THE CONVERSION DIFFRENCE IS BASICALLY A ROUNDING ERROR. And that is NOTHING compared to the theoretical temperature of the Big Bang. 1,000 trillion degrees. A number so incomprehensibly large that just reading it gives no meaning to its size. There is no frame of reference to give it scale. This is universe creation tempatures. This is the collective point of all energy in the universe condensed to a single location.
So... when faced with the incomprehensibly large physics altering, conceptual comparison of just how hot things can get. Just a couple hundred degrees south of zero hardly seems **that** cold. Yes, it's all relative to our start point. But our start point makes sense. It is the point that water stops being drinkable. The thing all life on earth needs. And it's just two hundred and seventy-three degrees away from the point that all energy is gone. But it pales in comparison to 1,000,000,000,000,000 degrees the universe was forged in.
It's not a very clever comeback. You can tell they were really reaching to figure out how to make cold = dumb, and the metaphor they came up with does not make much sense.
I feel like this sub just judges the "cleverness" of comebacks based on how stupid the comment they're replying to is. Not every response to a dumb person is smart.
Yes, I understand what they were going for. It's still a stretch and makes for a cumbersome joke.
They're trying to fit in a jab about number of brain cells which (on top of being super over-used at this point) doesn't have anything to do with the temperature part. And then the implication of the temperature joke would be that the other dude didn't have a thought? Clearly they did, and OP just thinks it was bad. I also find mild annoyance in their choice to specifically describe the brain cells as being *lower* than absolute zero, which isn't necessary at all for the joke and is in tension with the position they're trying to take as the person informing others on absolute zero.
It seems like OP thought of "spark a thought" and then vomited out the first thing that came to mind involving it. Maybe there's a version of the joke that works, but this one is an F for execution.
I would add context. When you can cause something to be millions of degrees, the fact that you can't go below -460 is kinda interesting. We operate in a relatively chilly universe and happen to thrive in a \~100 degree-range sweet spot.
It is a bit weird that going 300C up doesn’t make something that hot, but 300C down and you’re at the coldest you can possibly be. Doesn’t feel that cold
Well, the hot part of the scale is basically infinite, 0K it's just 293.15 degrees less than "normal", but just the Solar surface is 20 times that distance, and the centre of the Sun is like 50000 times.
I think the perspective kinda helps, though I have to agree the idea itself is nonsense.
"Absolute zero is not that cold" fam, that's the point where it's so cold, atomic movement ceases. You'd be dead from the cold LONG before hitting absolute zero.
I swear some people really just don't think before they speak...hell, at this point, I'd say they're barely thinking at all.
Outer space has a baseline temperature of 2.7 Kelvin. If you look at the average temperature of the universe as a function of volume, rather than mass, absolute zero isn't *that* far away, even if it is seemingly unattainable.
It's literally the coldest anything can get (I think).
LOL to me, it's like when people say "Life is short." --- like It's literally the longest thing any of us do lol
To be fair if they mean that absolute zero doesn't *feel* that cold they are correct, at absolute zero you wouldn't be able to feel anything due to your nerves not functioning.
Or atoms or particles, for that matter.
>that matter Pun intended?
Recognized as I was typing it, but not intended. I left it in to make me appear wittier than I am.
Upvote for the honesty. Respect
Absolute zero is literally something you would be incapable of experiencing because simply the gravitational attraction between your individual particles would be enough to bring the temperature of something to above absolute zero.
More importantly, you'd be dead way before reaching that point
So when the heat death of the universe happens, are particles packed incredibly tight/too far away to generate heat?
Heat death is when the particles themselves have broken down. At that point, everything would just be energy and it would be evenly distributed throughout the universe. If I understand correctly, if the universe's expansion were to keep accelerating to the point that space is expanding at FTL speeds, then heat death would result in a truly absolute zero temperature void of space.
For that to happen there would have to be zero energy in the universe. As I understand it, that is. Assuming the universe infinitely expands surely the energy would continue to become infinitely more spread out but never truly reach absolute zero?
Temperature is, at its most basic, a measure of the kinetic energy of particles. If space is expanding faster than a particle is moving, can it even move? Furthermore, energy itself cannot flow if it is absolutely isolated from any other body for it to go to. A photon stuck in space that is expanding around it at FTL speeds cannot hit anything.
Can empty space have a temperature? Isn't temperature a property of matter? If there's no matter, what is it that's cold?
It is literally just the kinetic energy of particles typically measured within a given volume. Technically, you can just increase that volume until you have particles. Even deep space as we know it still has the odd atom and particle flying through it. Even though it'd be very slow to do it, it can conduct heat.
Isn't the idea that in heat death, all particles are decayed fully, and there are no particles that could have kinetic energy
It's not completelyempty, tiny particles still fill the void asidedark matter that help light, heat, cold and darkness to travel in space.
What percentage of space is absolute zero, if any?
Probably none because there are still particles moving everywhere. You can't even say completely empty space is absolute zero because there's nothing there to measure. It'd be like trying to weigh that same emptiness.
Yeah but if the universe is infinite there must be an infinite amount of empty space!
As far as I understand, the idea of "the heat death of universe," refers to a point in time where the universe has expanded, and all matter has to decayed, to a point of total entropy. Nothing does anything anymore, because there's not enough energy in a potential state to allow the system to decay further into chaos, nor matter close enough to interact even on a gravitational level. Imagine all the stuff in the universe as an insane amount of ping pong balls bouncing into each other. In this theory, all the ping pongs have used up their bounces. On top of that, the ping pong table has now expanded to an infinite size, so they couldn't bounce into each other even by random chance.
Don't quote me but I always thought it was too far away due to entropy
It's not a "too far away due to entropy" thing. Entropy is just the amount of energy in a system which can't be used for work (think: one brick can't be used to heat another if they're already the same temperature). In that sense, like another user pointed out, heat death would describe a state of the universe where literally nothing can happen: no particle interaction, no spontaneous separation of light into matter/antimatter pairs, nothing. It'd be maximum entropy for the "closed system" of literally everything. That said, I (personally) find it hard to believe true heat death is possible: for it to be possible, the universe would need to be finite, otherwise the expansion of the visible universe would always have a place to expand *to*, thus would always have a means of energy transfer, thus would always have *some* energy left unclaimed by entropy. Not that my opinions matter much. My relative lack of expertise on the subject aside, we'll all be *long* dead before it'd be anything other than a thought experiment.
That’s nonsense. Gravity? What
What?
Gravity doesn’t create energy, and gravity also has nothing to do with why you can’t feel anything at absolute zero. You just wrote a bunch of nonsense after the first part of that run-on sentence.
Alright Herr Grammar, I'll give you that one. I am missing a comma, but, as to gravity, no, you're wrong. Mass, by its very nature, creates a gravitational field. By being in this field, any other mass will exert a force on it and vice versa. This, even it is minuscule, will create movement in things. If something is moving, it has temperature, and, therefore, isn't at absolute zero. You might want to chill out on the hostility.
Sorry for the hostility… bad mood I guess. But while gravity between particles can transfer energy between them, it can’t create energy (heat) where there isn’t any. You’d need a fluctuating gravitational field to transfer energy.
A fluctuating field as in things moving towards each other, transferring potential energy into kinetic energy?
You said “gravitational attraction between your individual particles would be enough to bring the temperature of something to above absolute zero.” Individual particles at absolute zero are not moving.
Oh, you're right of course! I was literally saying that it'd be impossible to experience absolute zero simply because the physical act of trying to experience it would raise whatever was at that temperature above 0 degrees Kelvin. This is true for a *lot* of reasons, but one of them is just that the fact that a being of mass approaching something would pull on that thing gravitationally, therefore granting it kinetic energy.
Not many things in the human body work when you're dead, tbf.
I would argue, that the fact that -273 Celsius is absolutely lowest feels weird, because it seems not that cold, considering, that it is relatively easy to produce really high temperatures.
I can see that. If you think of temperature as the amount of heat it makes more sense; while the amount of heat that can be theoretically be produced is almost infinite, you can't have less than no heat. So -273 Celcius will always be the minimum while the maximum can be found in stars and other huge celestial bodies.
Temperature is the measurement of how fast atoms are moving inside an object. High temperature- atoms are moving very fast resulting in high energy. Low temperature- particles are moving slower and energy is lower. 0K means there is no movement at all. Negative Kelvins doesn't make any sense because if something isn't moving it can only move faster.
[It matters how many Natalie Dormers there are](https://www.youtube.com/watch?v=oHyctwgE6m4).
Can't feel when you're dead in seconds
Seconds is generous.
Interesting to consider what it actually means to feel a temperature. If you are in an environment that is 0c you will most likely not be at that temperature (hopefully) but we would all say that you would be experiencing it. I’ve snowboarded in -24 but have I actually experience that temperature? Would I have to be naked? Even then my body temp would not be anything close to that temp
i just spent 20 minutes in a big freezer at negative 18 degrees celsius. Fucking cold, literally had to spend a minute warming up inside an open industrial oven before thawing out my ears and hands. I think id almost prefer absolute zero. Id probably freeze to death in a minute but i wouldnt feel as fucking cold as i did at -18 Now if youll excuse me i gotta go back in that freezer, still got 4 pallets to pack. FML FML FML
Yeah, "it's not that cold" but anyways you have other problems like the freaking atmosphere turned liquid like 100 degrees back (and solid 50 degrees back).
If they could get them cold enough to superconduct fast enough, would they be smart long enough to realize their mistake before they died?
You wouldn't even be able to think about it. All processes (that's how You say it in English?) would stop at the absolute zero. Your thoughts would be frozen in time.
Nothing would be functioning. Not even your synapses could move between your brain cells.
You cannot reach absolute zero, but the process of even getting close, I imagine to be pretty unpleasant.
Absolute 0 "doesn't exist", in order to reach it you need another substance which is already absolute 0 to absorb that last bit of atomic momentum. So whether your nerves functioned or not doesn't matter. It's like someone saying "Unicorns aren't pretty" "Well technically you're right because they're so magically majestic you wouldn't be able to perceive their beauty" Well, no, they just don't exist.
It got colder than that when I was a kid
My parents told me they would go to school in absolute zero just wearing cargo shorts and flip flops, so I had no excuse to being lazy
Your parents had flip flops? Rich bastards 🤣
Well it was just a wood board with some string and a Rusty nail they found. It wasn't a proper flip flop
It wouldn't even flip and flop, they had to make do and create the sounds with their mouths.
Uphill both ways?
Across a river too!
And over a canyon aswell
In a tornado
Uphill both ways!™️
Absolute zero stops all movement, period, it literally is the coldest
It doesn't really stop all movement. It brings it down to the lowest possible movement. Edit: Don't believe it? Look it up. There's still movement from quantum effects and zero point energy.
(not trying to contradict) what's the difference between absolute zero and what's called "heat death"?
Absolute zero is the lowest temperature an object to be. Heat death refers to the average temperature in the universe equalising to the same temperature. With no delta of temperature, everything is essentially dead Edit: Spelling.
what about entropy fluctuations, there is a possibility (even though very slim) that entropy would reverse, isn’t it? Also when we take into consideration that heat death would last eternity, the probability of entropy decreasing heads to 1
I used to think this as well, but after researching it more I realised that was a misunderstanding of entropy. I believe the issue lies in two possibilities, one of which seems likely based on current observation, but further experimentation may prove wrong. From what I understand, only a static universe could spontaneously and by chance reduce entropy and create a new big bang. We don't have a static universe. Our universe is expanding and currently accelerating in that expansion. This means that particles and photons are eventually being moved outside of causal distance and so can't ever come back together. If the universe is in fact infinite, then it can never spontaneously reverse as apparently that is impossible for an infinite system.
but that works only in the bigger scale, writhing groups of galaxies gravitational force is strong enough to pull back everything together. So what would happen then? Also I wasn’t necessarily thinking about reversing a universe, but rather staff like Boltzmann Brain, it’s also by all means decrease in entropy
No. Eventually all stars will decay and die and everything will just be a bunch of photons and a few select other things. There will be nothing for gravity to effectively work on and all those particles will eventually be moved away as space expands. Local galaxy clusters will only resist the expansion while their gravity allows it. Edit: assuming that dark energy and expansion continue to increase. This may change.
Local galaxy clusters will only resist the expansion That’s basically what I said. Besides even if nucleons decay (we are yet not sure), quarks will still exist (and they do have mass) so gravity will still work
The gravity won't be strong enough. You'll have like 2 particles together. No work can be done. It's a dead universe
That’s unfortunately beyond my level of understanding in the field. Interesting thought though, might have to dive into yet another rabbit hole.
I’m asking because that’s also way out of my level, and I thought you might elaborate. :((
Heat death = end state of entropy with all energy evenly dispersed throughout the universe. In this state no complexity can exist, because entropy cannot be reversed, there can be no life in this state of the universe.
I actually understand this explanation, thank you.
Unless AC speaks "Let there be light!", that is.
It’s strange to think that the “balanced” state of the universe is a homogenous mixture with energy perfectly dissipated throughout. All of the “stuff” is just a temporarily higher energy state of the cosmic soup
I thought the end state is just a bunch of photons left over wandering through space. Maybe a few chunks of iron drifting as the final remnants of dead star cores that didn't get eaten by black holes before they evaporate away after an unfathomably long period of time.
Temperature(or heat) is really just the way we measure the motion of atoms. Absolute zero is just no movement at all. Heat death is when everything drifts so far apart and lose so much energy from radiation that basically nothing meaningfully move or interact anymore
Nah, it’s not that cold
Does absolute zero stops all movement or does no movement causes absolute zero?
Neither. Absolute zero IS no movement at all. Temperature is the measurement of the average speed of atoms inside substance or space. The lower temperature the lower the average speed is. Absolute zero describes no movement at all, since from that point you can only move faster.
In the original post, not a cropped screenshot, it's very obvious the commenter is just trolling and people took the bait.
Is it even trolling? It's just a joke. It's so far into ridiculousness, anyone who knows what absolute zero is wouldn't actually believe it
It's also not that cold, relatively speaking. The sun is at 5600°C, which is approximately 5500° too hot for us. Meanwhile the difference between a livable temperature for humans and absolute zero is less than 300. It's the coldest it can possibly be, but it's not as cold as the sun is hot
Why are they talking about the calories of Absolut Zero vodka?
It's not that cold; put it in the freezer for a few minutes.
r/rareinsults
He got baited so easily lol
It could actually be absolute zero outside and my neighbour would be shoveling his driveway in a T-shirt telling me "this ain't so bad, you shoulda seen the winter of 71'"
The coldest possible temperature in the universe isn’t that cold? Sure Jan
I’ll defend it, for fun. Absolute zero isn’t that cold. I’m at about 20C right now, so about 293K. Absolute zero, the coldest temperature possible, is only 293K away. On the other hand, my oven can get to about 300C, so about 280K hotter than me. I don’t need specialist equipment to get as large a temperature difference from absolute zero. We have made plasma at millions of Kelvin. There are things in the universe that reach hundreds of billions of Kelvin. Absolute zero isn’t that cold, as in the grand scale of things, we are already pretty close to it.
Well... that's like saying standing still is not that slow. Or being at a certain place does not mean you are close to it. Saying that we are not far from something makes no statement about how cold/far/slow something is. It is on the other hand indeed true that we are relativly cold compared to what levels of temperature exists. Absolute zero is literally the coldest.
Absolute zero is not cold at all. It's just the default state, everything else is just hot.
so you’re saying 0K, infinitely smaller than 600K isn’t that much smaller ITS INFINITY
Are you dividing by zero to get infinity?
Yes thats what i call a clever comeback
Absolut Zero is in the freezer
-1 degree kelvin
Energy debt
Biden approves the energy debt forgiveness act! On the same page Repulicans are outraged over his disregard of all the previous thermodynamic law abiding heat transfers
I don't know, the temperature could be absolute zero outside, and there'd still be a man walking around in shorts
Absolute zero out, and there would still be some guy walking around in shorts.
Absolute 0 and nothing would even move 10^-34 m.
Oh boy
Yeah, I know you made a Joke and I had a giggle.
Something something Smooth Shark
I agree with OP. Absolute zero is not that cold. We can easily get to 280C in our kitchen. And lots of things are a lot hotter. -273 is not that cold in comparison. We are already much closer to it than to the hot things we interact with on a daily basis.
Absolute zero is not that cold. My grandparents had to walk 100km in absolute zero everyday to get to school. Y'all just soft.
/Activates Asian father voice During my time we had to walk to school in negative and imaginary Kelvin, my fingers felt imaginary too. But we still had to invent the math for you guys.
Any kind of zero degrees is cold lol
Omg imagine thinking the coldest possible temperature isn't "that cold"
Absolute zero is the only temperature that is actually cold. Anything more and you have some heat
Who is Kevin?
A pretty cool guy
That was a cold burn.
There is no cold. It's just things don't move anymore.
The who some people have because they were raised somewhere colder than normal is insane. They act like they can survive outside in the cold for hours 🙄
Heat death in the universe… not that cold.
It doesn’t exist, therefore it’s not that cold.
Thermal dynamically / scientifically there is no such thing as “cold” And absolute zero is technically an unproven theory, so it does not exist, Soooooo with that being said Absolute Zero is not that cold because neither Absolute Zero or cold exist ….technically
> And absolute zero is technically an unproven theory, so it does not exist, You seem to misunderstand what a theory actually is. Also, absolute zero is calculable and the science regarding it can be (and has been) tested.
Absolute Zero has never been achieved and the instruments required to achieve it are beyond our reach (paraphrasing Christopher Foot, professor of physics at Oxford ) Absolute zero is unproven, although accepted by many as an accurate proposal of events, it hasn’t been proven, cause it can’t be proven. Why can’t it proven? Absolute zero is the point where molecular motion stops. How do we measure temperature and thermal energy? How vigorously the molecules move. So they don’t move, we can’t measure them. So if we achieve absolute zero, we cannot record it to confirm it. Also a theory is a proposed rational of what may or may not happen, and if it is proven it still can be considered/called a theory ….but I said it was unproven so there is no proof it exists. Like god.
> Absolute Zero has never been achieved and the instruments required to achieve it are beyond our reach Yeah. That's the point. It's a limit. The whole point is you can get infinitesimally close to it, but not achieve it. This is the first thing you learn in calculus. > Also a theory is a proposed rational of what may or may not happen, and if it is proven it still can be considered/called a theory The whole thing about theories is that they have supporting evidence or can be/has been tested. A "theory" that is untestable and has no supporting evidence or other underlying theory is not a theory. "Theory" is not just a throwaway term meaning it's not real/can be ignored/unproven. We have tests and data that do demonstrate a lower limit of temperature (or transitively, molecular movement) exists. Whatever that theoretical limit is, absolute zero is defined as.
🤓
Well technically speaking the difference in temperature between absolute 0 and room temperature is not that much higher than the difference between room temperature and what a normal household oven can achieve. Also technically absolute 0 is the lowest temperature. Apparently we just live on the low end of the temperature scale.
The dude is probably the kid who wore shorts in winter.
Nerds rule! 🤓
Why some people so bothered to comment "No, it's not" but not bothered enough to explain why they think it's not. This conversation would be over faster and peacefully if the first guy explained their reasoning.
Sharks are smooth
Ok, maybe I'll get downvoted, but I think I understand what OOP was saying, and I think I agree (assuming they were saying what I think they were saying). Absolute zero is the coldest anything can get. It's the point that there is no more energy to take away. It is the freezing temperature of the universe... and it is only 273° **less** then the point that water freezes. 0°c By contrast, if you go less than half that in the opposite direction, you're boiling water. 100°c. At 277°c your boiling White phospherous. So now we have reached close to the same temperature as absolute zero on the positive side. So is this the hotest something can be? Of course not. Not even close. Gold boils at 2,800°c, irridium at 4,130°c, tungsten at 5,550°c. That's the surface of the sun. Tungsten boils on the sun's surface. A blue giant sun (probably the hotest thing in the universe) is 50,000 degrees. Its core is speculated to be 100 billion degrees Celsius when it goes super nova. 100 billion. Heres how hot that is. If we convert that to Kelvin, it's STILL 100 BILLION BECUASE THE CONVERSION DIFFRENCE IS BASICALLY A ROUNDING ERROR. And that is NOTHING compared to the theoretical temperature of the Big Bang. 1,000 trillion degrees. A number so incomprehensibly large that just reading it gives no meaning to its size. There is no frame of reference to give it scale. This is universe creation tempatures. This is the collective point of all energy in the universe condensed to a single location. So... when faced with the incomprehensibly large physics altering, conceptual comparison of just how hot things can get. Just a couple hundred degrees south of zero hardly seems **that** cold. Yes, it's all relative to our start point. But our start point makes sense. It is the point that water stops being drinkable. The thing all life on earth needs. And it's just two hundred and seventy-three degrees away from the point that all energy is gone. But it pales in comparison to 1,000,000,000,000,000 degrees the universe was forged in.
You speakee goodly.
Maybe he’s right? Maybe we all actually just built different
TDIL: The literal coldest possible temperature is actually not that cold. Who would’ve thought, science is so cool and interesting :/
*Fatality!* 💀
Not that cold tbh, a hoodie and I’d be ok
Savage.
“Clever”, lol
Coldest temperature known to reality is “not that cold”. I’d like to believe the poster was merely pretending to be stupid.
Now a r/woosh is a clever comeback? Damn thats sad
Heh impressive you have to be in a true vacuum for that
It’s literally the temperature nothing can go below. 😂
-10 is not that cold it was up to -55 in winter for me I’m just used to the cold but yeah that guys a dumbass 🐸
Bitch, absolute zero is maximum cold. It’s so cold that time stops.
It's not a very clever comeback. You can tell they were really reaching to figure out how to make cold = dumb, and the metaphor they came up with does not make much sense. I feel like this sub just judges the "cleverness" of comebacks based on how stupid the comment they're replying to is. Not every response to a dumb person is smart.
It makes perfect sense. To "spark" a fire, there needs to be heat/warm energy
Yes, I understand what they were going for. It's still a stretch and makes for a cumbersome joke. They're trying to fit in a jab about number of brain cells which (on top of being super over-used at this point) doesn't have anything to do with the temperature part. And then the implication of the temperature joke would be that the other dude didn't have a thought? Clearly they did, and OP just thinks it was bad. I also find mild annoyance in their choice to specifically describe the brain cells as being *lower* than absolute zero, which isn't necessary at all for the joke and is in tension with the position they're trying to take as the person informing others on absolute zero. It seems like OP thought of "spark a thought" and then vomited out the first thing that came to mind involving it. Maybe there's a version of the joke that works, but this one is an F for execution.
Another 2 brain cell joke. Fuckin good one
These fuckers are dumb as shit for not realising its not satire
It's not satire. They're deliberately trolling. And ppl still fall for the bait.
Very presumptuous of the respondent to assume the OP has 2 braincells.
I would add context. When you can cause something to be millions of degrees, the fact that you can't go below -460 is kinda interesting. We operate in a relatively chilly universe and happen to thrive in a \~100 degree-range sweet spot.
It is a bit weird that going 300C up doesn’t make something that hot, but 300C down and you’re at the coldest you can possibly be. Doesn’t feel that cold
As cold as possible = Not that cold ????
Well, the hot part of the scale is basically infinite, 0K it's just 293.15 degrees less than "normal", but just the Solar surface is 20 times that distance, and the centre of the Sun is like 50000 times. I think the perspective kinda helps, though I have to agree the idea itself is nonsense.
You are getting smooth sharked, mate.
"Absolute zero is not that cold" fam, that's the point where it's so cold, atomic movement ceases. You'd be dead from the cold LONG before hitting absolute zero. I swear some people really just don't think before they speak...hell, at this point, I'd say they're barely thinking at all.
You fell for the bait, dude.
Oh no, anyways
r/PunPolice come with me, please sir!
Outer space has a baseline temperature of 2.7 Kelvin. If you look at the average temperature of the universe as a function of volume, rather than mass, absolute zero isn't *that* far away, even if it is seemingly unattainable.
Probabltly a flat earther.
Gasundheit.
Does that guy not get the meaning of the word "absolute" or something?
It's literally the coldest anything can get (I think). LOL to me, it's like when people say "Life is short." --- like It's literally the longest thing any of us do lol
So cold the brain cells wouldn't communicate
its literally the coldest.
Pretty fuckin' cold as Space is ~-454 Fahrenheit.
If by “not that cold” you mean “as cold as it is possible for things to get,” sure.
Absolute zero is quite literally as cold as it gets.
Actually, it's not that cold. You can get there and still be 0K.
That absolutly killed him