does space and time have substance ?

does space have substance in the absence of plasma and/or matter?

Actual baryonic matter only makes up 5% of the universe's mass, but it depends what you mean by substance.

meaning does space in and of its self , by its very nature have a substance , something to grab onto

a form of energy or matter of which space is compossed

can time change movement in and of its self of any object?

and does space have substance in the absence of plasma and/or matter ?

I say no to both questions

It is false to say time changes. Things changes in time, but time do not change in time.

Space-time is a 4 dimensional differentiable space-time manifold in relativity, and the state of minimum energy in quantum mechanics. Both theory demands that space-time be something with specific properties.

In general relativity, it is assumed that spacetime is curved by the presence of matter (energy), this curvature being represented by the Riemann tensor. In special relativity, the Riemann tensor is identically zero, and so this concept of "non-curvedness" is sometimes expressed by the statement Minkowski spacetime is flat.

where R and g pertain to the structure of spacetime, T pertains to matter and energy (thought of as affecting that structure), and G and c are conversion factors that arise from using traditional units of measurement. When Λ is zero, this reduces to the original field equation of general relativity. When T is zero, the field equation describes empty space (the vacuum).
The cosmological constant has the same effect as an intrinsic energy density of the vacuum, ρvac (and an associated pressure). In this context it is commonly defined with a proportionality factor of 8π: Λ = 8πρvac, where unit conventions of general relativity are used (otherwise factors of G and c would also appear). It is common to quote values of energy density directly, though still using the name "cosmological constant".

It saids here that space-time curved by the presence of matter. According to some people, if something has properties, then it exist. Well, space-time must exist, since it has properties of being curved in the presence of matter.

yet they give NO definition as to the properties that space and time would have , do they

What the hell does that mean?

Quote:
Originally Posted by north


yet they give NO definition as to the properties that space and time would have , do they







they say that both space and time have substance and they see a consequence of this , as the reason

where is the evidence that both space and time have actual substance though ?

You are wrong on two things:

Quote:

1. There are no space, or time, separately. There is only one space-time.

yes there is a seperation of space and time

space is the room which an object needs to exist

time is the measurement of the movement of things , within a said space

time needs space but space doesn't need time

Quote:

2. You cannot give definitions to things. Things either exist, or they don` t exist. They have properties, and you can describe those properties, but there are no definitions.

a tree is a tree is a tree

time needs space but space doesn't need time

I believe this is a debatable argument.

I believe so too as its known as the space time continuum. Time is mysteriously missing in many of the equations of modern physics. There is evidence however that even as powerful as modern science is much is still missing, incomplete and not known.

Space of course is not empty as virtual particles dart in and out of existence in a frenzy of quantum foam. Space is full of "dark energy" estimates are that most of the energy of the universe is in the "vacuum" between galaxies. We can measure these vast amount of "dark energy" with satellite data but none of our equations account for it. A very large mismatch between data and theory in this case. No know theory can account for the quantity of dark energy measured by satellite data. At least space has "substance" and "time" is yet to be accounted for.

can time change movement in and of its self of any object?

and does space have substance in the absence of plasma and/or matter ?

I say no to both questions

I have to agree, as I don't belive time to exist, though I do belive space are filled with tiny bits of various particles.

Time definately exists. You only have to raise the question of how do you measure these "tiny bits of various particles" speeds.

Quote:
Originally Posted by HexHammer
I have to agree, as I don't belive time to exist, though I do belive space are filled with tiny bits of various particles.




AND thats where time fails

time is based on the measure of " tiny bits of various particles "

not on time , in and of its self , but on the particles movements

hence speed

can time change movement in and of its self of any object?

and does space have substance in the absence of plasma and/or matter ?

I say no to both questions