/sci/ - Science & Math

>So do higher levels of entropy cause time to move at a faster rate?

No. How we perceive time does not change how much time actually passes.

I once heard Stephen Hawking give a talk and he said that the universe would stop expanding and start contracting and when it did then time would run backward which meant that entropy would be reversed. Or at least that's what his interpreter said he said. This was back in the '80s when he could still talk, but only his close associates could understand a word he said. So for all I know his interpreter might have got it completely wrong.

>>2500692
>dat hairy forehead
Shit, time makes fools of us all.

I don't mean human perception. Time constriction if you will. Maybe my latter concern of entropy-mass relation is more apt since mass directly governs the passage of time.

>>2500797
Entropy is an extensive property, its always reliant on the size of the system.

>>2500692
>>2500692


1) the concept of "entropy as a measure of time's direction" is really:

the CHANGE in entropy is a measure of the direction of time

standard state entropies, and the inherent entropy of a system (w=e^(-s/k) microcanonical partition function) are constants at any given instant of time.


2) our conciousness/mind does not perceive time WITH RESPECT to some "standard" process....

in other words: our brain does not monitor the oscillations of a quartz crystal, or the distance traveled by light, etc..


to our brains, time's passage is a completely inherent, absolute, "fact of life"

to our brains, the concept of time's passage is a constant of "our universe"

3) therefore we do not measure time (we: people, brains, minds, etc) with respect to entropy.
really, the only correlation I can think of is in the time reversibility priniciples (symmytries of physics) in particle and optical physics.

>>2500797
I find you boring, as a person, and I don't believe you're a doctor, much less The Doctor.

More or less of something doesn't mean something else is directly changed.

Space is exapnding, but more space is not being created.

The level of entropy might appear different from given relative viewpoint of time, but that doesn't mean there is more or less time or entropy.

>Dose eyes
>Hairy forehead
>Wait what back up
>Hair forehead

>>2500804
>Entropy is an extensive property, its always reliant on the size of the system.

This explains a lot. The more mass is diluted, the lower local gravity, the less time dilation.

However I'm not sure how it applies to complex stuff such as life (an extreme example).

>>2500834
The expansion of space is an entropy in itself.

>>2500824
I have a degree in medicine.

>>2500692
Even if "entropy" didn't exist (say the universe began infinitely entropic or something), the weak force is still not time-reversal invariant. Actually, it's somewhat of a more powerful measure of the flow of time because it's a more "fundamental" concept. Entropy is meaningful only in macroscopic situations where "structure" begins to take on meaning. Entropy is a useful, but somewhat artificial, concept.

>>2500821

I disagree with 2. The human mind may use a comparitive physical process for it subtantiate the passage of time.

Consciousness (and everything) only exists in the moment, now. Because of this, the perception of time is a function of memory development and recollection. Higher rate of memory creation (a comparative physical process) would cause 'time' to be percieved to flow at a slower rate where as a higher rate of memory recollection (another comparative physical process) would cause 'time' to be percieved to be at a slower rate. Conversely, slower rates of creation and recollection would cause 'time' to be percieved to be more slow and to be more rapid, respectively.

The above hypothesis logically explains your perception of time during dreams/sleep and also why time seems to pass more rapidly as one ages.

Also, if you understand what I just posted, congradulations, you can also understand Special Relativity.

>>2501056
I know very little about the weak force, but I believe entropy to be the most basic of principles, It's a gestalt variable that describes the dynamics of any given system. Anytime you have a system, however large or small, entropy applies. (So I claim. I haven't really gotten into quantum physics yet.)

Imagine another universe, with remarkably different laws of physics. Entropy would still exist unless that universe was static.

Entropy only works as an indicator of the direction of time, because at the universe started with low entropy. It only has one direction along the dimension of time in which to increase. People who think that time somehow comes from entropy don't know what the fuck they're talking about.

>>2501353
It does increase as we perceive it, but it also works backwards. The universe might as well have started with maximum entropy and be moving towards minimum entropy. Which is what it would be like if we reversed time. Doesn't entropy establish causality, without which nothing would ever change and no awareness of time could exist?

>>2501353
I would much like for you to substantiate your point.

>>2500776
Mind status: Blown.

Without entropy on a cosmic scale, order would begin to win out. Not sure if that does say anything about time.

>>2501456
Entropy doesn't have anything to do with causality. Entropy also only applies in macroscopic systems, if you have a system of only a few particles entropy is not a very welldefined quantity at all, but time still very much exists. Also, in the standard model time-symmetry is broken which means that physics would work differently if we suddenly reversed the direction of time. So in short, entropy doesn't give rise to time, time exists on its own.

>If not for entropy, time wouldn't exist in the linear sense since all processes would be fully reversible.
*cough*bullshit*cough*
http://en.wikipedia.org/wiki/Arrow_of_time#The_causal_arrow_of_time

Entropy isn't the only reason time is linear, or one-way.

>>2501159

An older person has a greater capacity for memory creation, but has a lower capacity for memory recollection than a younger counterpart so therefore, time is perceived to flow a faster rate?