Time is NOT the 4th dimension...

So then space and time are the same that way, right? You can't have a piece of time nor a piece of length.

 

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no piece of time , no piece of space length

 

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I see. Thanks. That’s consistent with how dictionaries like Merriam-Webster define it. E.g. see - http://www.merriam-webster.com/dictionary/physically

In this sense physical means having a material existence. The problem with this is things like time, distance, magnitude, rotation, energy, temperature etc. while not being physical are still widely used concepts. So it really makes no difference in physics whether you think of them as immaterial or not. Just make sure that it’s not confused with a phenomena that exists, such as time.

 

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time is a " phenomena " ? how so ?

 

If you prefer to rephrase it to read something like time is that which is used to desdcribe certain phenomena such as motion then that's fine. I prefer to think of it as the phenomena itself. Read that link I gave above, i.e. http://users.wfu.edu/brehme/time.htm . That's why I posted it there, to clarify all of this.

At this point its all semantics and I've never been interested in arguements like that.

 

good , because that is essentially what time is

define what you mean

 

As stated earlier, time is the rate of change, and is the 4th dimension of space/time.
Hawking says we have three arrows of time in his famous book, A Brief History of Time....
Cosmological arrow: This can be defined as the direction in which we see the Universe expanding rather then contracting......
Thermodynamic arrow: The direction in which entropy increases...
Psychological arrow: The direction we feel time passing, and why we remember the past but not the future....
The Psychological arrow and the Thermodynamic arrow both necessarilly point in the same direction, which is also the same direction as the cosmological arrow.

 

what has this got to do with my above quote ?

 

....You're trying too hard and as a result are seeing things that are not really there, and as a result, being rather delusional.
Time could also be said to be that which separates events......while space is that which separates mass/energy.......If we had no time, everything would happen together....if we had no space, everything would be together....
Hope that helps.

 

The point is space exists, time exists, and together make up the four dimensional framework we call space/time, against which SR/GR operates.

 

That is shear non-sense , time separates nothing , it is movement by objects in the sub-atomic and the macro that separates things

 

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Time is that which separates events...That is fact....and logical common sense at its most basic. Or it could also be put in the way I did earlier...Time is the rate of change.
Think about it.

 

So if time did not exist , does the rate of change to the Universe matter ?

 

There wouldn't be any change.

 

Yes there would

To the Universe the rate of change does not matter

Movement does though

 

Not according to the entire physics community

 

Really , the entire physics community ...?

 

Yes, really - the entire GENUINE physics community!

 

Again, if time did not exist, there would not be any change, either macro, or micro, and as dictated by the arrows of time, especially the thermodynamic and cosmological.

Time is the rate of change as illustrated by the cosmological and thermodynamic arrows of time.

 

IOW time is the rate of increase of entropy(each frame has it's own rate), but in spacetime, time is also a distance you can see.