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/sci/ - Science & Math

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7337218 No.7337218[DELETED]  [Reply] [Original]

Ok seriously, wtf is time?

>> No.7337219

>>7337218
Time is that which separates events observed at the same location in space.

>> No.7337221

Time to get a watch.

>> No.7337226
File: 104 KB, 870x642, time.png [View same] [iqdb] [saucenao] [google]
7337226

>>7337218
A mapping from the universe to a one dimensional affine space

>> No.7337228

>>7337218
ever since i learned that c is the same in all inertial reference frames my perception of time has never been the same.

>> No.7337231

>>7337226
This is funny, because literally every event in the universe is simultaneous with every other event in some reference frame.

>> No.7337234

>>7337226
Fuck Arnol'd and this terse shit. This is not what physics is about

>> No.7337245

>>7337228
Underrated post.

>> No.7337246

>>7337234
yeah physics is about smoking the ganj and looking at stars.
>>7337231
there exists a reference frames where every event is simultaneous or for every two events there exists a reference frame where they're are simultaneous?

>> No.7337261

>>7337246
For any two events, there exists a reference frame in which they're simultaneous.

I think this implies the existence of a reference frame for which everything is simultaneous, however.

>> No.7337268

>>7337246
>for every two events there exists a reference frame where they're are simultaneous
Even that isn't right. It's only true if the two events are spacelike separated.

>> No.7337277

>>7337268
Yeah, whoops. For events close enough together in space-time that some information travelling at lightspeed could have made it from one to the other, then you can't make them simultaneous. (You can, however, make them take place at the same location in space.)

If they're far enough away from each other in space and close enough in time such that a photon couldn't have made it from one to the other, then you can make them simultaneous (but you can't make them take place in the same space)

>> No.7337282

Time is a tool you can put on the wall or wear on your wrist

>> No.7337356

Let's imagine a photon in the primordial universe. We'll pick one such that it collides with nothing, it's on the edge. Since it's at c and will never have its journey interrupted in an instant from the photons perspective the universe has already arrived at the heat death. 10^100 years experienced in an instant.

>> No.7337359

>>7337218
All I know is that the human perception of linear time ruins all our lives.
We are obsessed with finding time, not running out of time, saving time not wasting time etc

>> No.7337483

>>7337218
Time is what you measure with a clock.

>> No.7337487

>>7337218
Time doesn't exist. It's a social construct in order to be organized.

Like, if all matter froze because it lacked properties, would time also be consider frozen, or would it still continue? Obviously, it doesn't exist, and the concept is a mechanism our brain invented.

>> No.7337488

>>7337218
There's no explanation for something that doesn't exist.

>> No.7337506

>>7337356
>on the edge
you done goofed there nigga

>> No.7337547

>>7337218
It's the square root of the interval between events added with the squared magnitude of the spatial distance between the events divided by the speed of light.

>> No.7337569

>>7337487
>>7337488
General relativity, you dumb fucks.

>> No.7337619

>>7337569
Quantum mechanics you dumbshit. There is no time. Quantum interactions can be run in either direction and there is no preference for a forward direction called 'time'. Probability prefers certain outcomes from mass aggregates of quantum reactions which we call Entropy. This entropy moves quantum particles in a pattern we believe to have a direction called time because our brains and instruments are made ultimately of quantum particles. Space itself may be quantum in nature and if so then then Relativity is as illusory as Newton's mechanics.

>> No.7337622

>>7337218
1 second can be defined as the time I fuck your mom once

>> No.7337688

>>7337218
The relative magnitude of velocity between things. You decide one thing to be your clock and then you measure the rate of change compared to that. Time is motion.

>> No.7337748

All the words we use to define times need to be defined from time: Movement, velocity, change...

Time is a primordial concept that cannot be derived from a more primary concept.

You'll never get a satisfying definition

>> No.7337752

>>7337261
>>7337231
Wrong, rofl.

>> No.7337781

>>7337688
This, all day long.

>> No.7337928
File: 140 KB, 1024x768, La persistencia de la memoria - Salvador Dali.jpg [View same] [iqdb] [saucenao] [google]
7337928

La persistència de la memoria. Salvador Dalí i Domenech - From Catalonia

>> No.7337935

>>7337688
Based

>> No.7337988

>>7337928
Persisténcia implica que ocurre con tiempo. Not really a good definition since it references time within itself

>> No.7337996

The set of all of class of abstraction induced by the relation of simultanity on the set of all events

>> No.7338315
File: 59 KB, 919x720, 1401821964442.jpg [View same] [iqdb] [saucenao] [google]
7338315

So you measure time is a measurement for time?

>> No.7338324

>>7337261
What the fuck, no. Unless you mean from the reference frame of a photon, then maybe.

>> No.7338333

>>7338315
No, we define that when we count some number of oscillations of a cesium atom, one second of time has passed. We have defined it now. In the years before sliced bread we had to use much rougher standards, but in practice any ayy lmaos can figure out how much time our second is by just counting.

>> No.7338340

Well you see, at any given time... fuck

No wait, so things change right? But change is just the difference between two times... damnit

>> No.7338532

>>7337622
From start to finish?
>premature ejaculator detected

>> No.7338595

>>7337619
the matrix has you bro
wake up

>> No.7338598

>>7337226
this does not answer OPs question at all

>> No.7338601

>>7338598
Oh sorry. You wanted some metaphysical handwavey answer.

>> No.7338745

Time is just one of our many dimensions.

>> No.7338758

>>7337928
>>7337988
Persistencia no lleva tilde

>> No.7338768

>>7337218
Time is an illusion, time is just change which is perceived as time as we have "markers" which we can relate the degree of change to

>> No.7339024

https://www.youtube.com/watch?v=R1cexcjdyIE

>> No.7339806

>>7337218
Time is an American weekly news magazine published in New York City. It was founded in 1923 and for decades was dominated by Henry Luce, who built a highly profitable stable of magazines.

>> No.7339808

>>7339806
>>7337221
KEK'd

>> No.7339978

change

>> No.7339980

>>7338758
En català sí. S'ha deixat l'accent en "memòria". Salutacions.

>> No.7340009

Time does not exist. The past has ceased to exist, the future has not existed yet, only the present exists.

>> No.7341440

>>7337356
>Since it's at c and will never have its journey interrupted in an instant from the photons perspective the universe has already arrived at the heat death.
But the universe heat death assumes that all energy is spread evenly in all places, which can't be true if the photon never collides with anything. Therefore, in this scenario, heat death is impossible.

>> No.7341601

a flat circle

>> No.7341611
File: 266 KB, 320x180, get-rekt-o.gif [View same] [iqdb] [saucenao] [google]
7341611

>>7337221

>> No.7341882

>>7338758
Is catalan, not spanish -_-"

>> No.7341897

>>7337218
Time is a measure in which events can be ordered from the past through the present into the future, and also the measure of durations of events and the intervals between them. This definition references the ideas of past, present and future, which in turn refer to time for their definition.

>> No.7341900

>>7337218

It's just a trick of the mind, an artifact of the speed limit of c. From a broader pov, everything just happens all at once, just like everyWHERE is just "there" all at once.

>> No.7341912

Most people think of time as a strict progression of cause to effect but really from a non-linear point-of-view it is more like a big ball of wibbly-wobbly... timey-wimey... stuff

>> No.7341913

>>7341897
>events can be ordered

Wrong, events can occur at different times and even in different orders, depending on your frame of reference.

Also circular definitions are circular.

>> No.7341920

>>7337218
um Time is a measurement of motion?

>> No.7341922

time is the fluid of space

>> No.7342002

>>7341913
How can events occur in different orders with a static frame of reference?
What would be a noncircular definition of time?

>> No.7342009

>>7337261
for every two points there exists a straight line that intersects both, but there isn't a straight line that goes through all points

>> No.7342023

I believe this example will help people understand what time is:

Take 2 moments in time.
Try to establish a both way communication in between.

>> No.7342148

using time to prove time