Is Time the Fourth Dimension in the Universe?

In summary, the conversation discusses categorizing the universe as composed of stuff, space, and motion. It is mentioned that defining stuff requires identifying what it is not, and that motion needs both stuff and space to exist. There are also observations about sub-types of stuff and their ability to transform, as well as the idea that space may be a form of energy. The conversation ends by considering the role of time in this perspective.
  • #1
machapungo
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Suppose one categorizes the universe as composed of only stuff, space, and motion.

It seems that to define stuff one needs to identify something that stuff is not.

Let's assume that space is not stuff and thereby allow a definition of both stuff and space.

Now, let's throw in the common observation that stuff moves in space and further that there seems to be no way to totally prevent it from moving in space. It seems reasonable that stuff should need space to move and that motion needs both stuff and space to exist.

Another common observation is that there are many sub-types of stuff and a common opinion that these subtypes can and do under certain conditions transform from one subtype to another.

I think, it is commonly conceded that both stuff and motion are a form of energy and can and do transform into the other under certain conditions. If this is true then that seems to put space in the do little position of not being able to convert into stuff.

In the quantum environment it seems that stuff can appear and disappear, as if, by magic. But, what if it it is really transforming into space? If so, that would seem to make the argument that space is just another form of energy.

It would also seem to make for a harmonious universe.

What do you see as the pro and con issues concerning this perspective?
 
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  • #2
Well, you've forgotten to account for time. Sure, stuff needs space to move around in, but if we're all stuck in the same moment of time, it's unlikely to be going very far.
 

What is the difference between matter and space?

Matter refers to the physical substance of the universe, including atoms and particles. Space, on the other hand, refers to the three-dimensional extent in which matter exists. Matter and space are intertwined, as matter exists within space and is affected by it.

How does motion occur in space?

Motion in space is caused by the force of gravity. Objects with mass attract each other and this attraction is what causes motion in space. Additionally, motion can also occur due to the interaction of objects with other forces, such as electromagnetic or nuclear forces.

What is the relationship between space and time?

Space and time are interconnected and form the fabric of the universe known as spacetime. According to Einstein's theory of relativity, the passage of time is relative and is affected by the presence of matter and energy in space. The concept of spacetime is essential for understanding the motion of objects in the universe.

Can space be infinite?

It is currently unknown whether space is infinite or not. According to the Big Bang theory, the universe began as a singularity and has been expanding ever since. However, the exact size and shape of the universe are still a topic of debate among scientists. Some theories suggest that space could be infinite, while others propose that it has a finite but unbounded size.

How do scientists study the properties of space and motion?

Scientists study the properties of space and motion through various methods, including observation, experimentation, and mathematical modeling. Space can be observed through telescopes, while the motion of objects can be measured using tools such as accelerometers and radar. Mathematical equations and computer simulations are also used to understand the behavior of space and motion.

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