/sci/ - Science & Math

[Anonymous No.6727505]

What happens after the heat-death of the universe?

[Anonymous No.6727507]

>>6727505
the universe stops moving

[Anonymous No.6727508]

>>6727505
Nothing

[Anonymous No.6727510]

>>6727505
blue screen

[Anonymous No.6727513]

>>6727505
Also, what would the universe look like when heat-death finally occurs?

[Anonymous No.6727515]

>>6727505
>>6727513

Don't worry about it.
I bet the aliens have our back on this one.

[Anonymous No.6727516]

>>6727513
black

[Anonymous No.6727517]

>>6727513
dont worry it will explode again

[Anonymous No.6727518]

>>6727517
Big Crunch got dis-proved though.

[Anonymous No.6727519]

>>6727517
then it hasn't reached heat death

[Anonymous No.6727520]

>>6727519
y-your mom hasnt reached heat death

[Anonymous No.6727523]

>>6727520
Glad to hear it

[Anonymous No.6727528]

>>6727523
y...y...yo-your moms g-glad to hear my b...butt

[Anonymous No.6729166]

>>6727505
I understand the gist of heat death (space expands, energy tends to like to spread out to areas of less concentration, eventually no work can be done because energy across space is homogenous), but I'm still very confused.

Like, if there is this tendency toward entropy, why can work even be done in the universe right now? Like, how does my fridge make the inside colder than the outside? How does it work against the entropy that should be making the inside and outside the same temperature? How are stars, huge glowing balls of hot gas, formed? Isn't that also against entropy.

I understand that everything is homogenizing in the long term, but why can things go the other way in the short term?

[Anonymous No.6729181]

>>6729166
You can reverse entropy in an open system if you use outside energy to do it. Entropy in the larger system will increase.

[Anonymous No.6729190]

>>6729166
> space expands, energy tends to like to spread out to areas of less concentration
Heat death happens with or without these things happening

[Anonymous No.6729210]

>>6729166

Hope this can be of some help:

How can it be that living beings are creating and communicating vast amounts of new information every day?

Why are we not still in that original state of equilibrium?

Broadly speaking, there are four major phenomena or processes that can reduce the entropy locally, while of course increasing it globally to satisfy the second law of thermodynamics. Three of these do it "blindly," the fourth does it with a built-in "purpose," or telos."

1. Universal Gravitation
2. Quantum Cooperative Phenomena (e.g., crystallization, the formation of atoms and molecules)
3. "Dissipative" Chaos (Non-linear Dynamics)
4. Life

None of these processes can work unless they have a way to get rid of the positive entropy (disorder) and leave behind a pocket of negative entropy (order or information). The positive entropy is either conducted, convected, or radiated away as waste matter and energy, as heat, or as pure radiation. At the quantum level, it is always the result of interactions between matter and radiation (photons). Whenever photons interact with material particles, the outcomes are inherently unpredictable. As Albert Einstein discovered ten years before the founding of quantum mechanics, these interactions involve irreducible ontological chance.

Negative entropy is an abstract thermodynamic concept that describes energy with the ability to do work, to make something happen. This kind of energy is often called free energy or available energy. In a maximally disordered state (called thermodynamic equilibrium) there can be matter in motion, the motion we call heat. But the average properties - density, pressure, temperature - are the same everywhere. Equilibrium is formless. Departures from equilibrium are when the physical situation shows differences from place to place. These differences are information.

(Credit: Bob Doyle)

[Anonymous No.6730086]

>>6727505
I hypothesize that all space gets filled with dark energy and continues to expand forever until all regions of space get relativistically disconnected.