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Gravity...what? (pg. 4)
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| Streakfury |
Ahh, where to start?? :p
Firstly, the universe is, as far as we can tell, finite. However, it is expanding at an ever-increasing rate outwards in all directions. The three-dimensional shape of the universe is thought to be a bubble, but to explain gravity, it has to be thought of as a flat plane.
Imagine holding a sheet out flat, with one person holding each corner, so that it was stretched out flat as tight as it would go. If someone then dropped a large ball onto the sheet, it would cause a slight dip, meaning that any other smaller balls that were on the sheet nearby would roll towards the larger one. This is what happens with bodies of mass in the universe, and is the reason why everything that has a mass is pulled towards everything else.
The larger the ball you put on the sheet, the bigger the dip it would cause, and so the balls that lay further and further away would also be pulled towards the large ball. Again, the same principle applies to the universe. The larger the body, the more gravity it has, and so the further afield it's effects can be felt.
As for the shape of the universe, well I say it's a bubble, but there are many universes that exist parallel to our own that can be any shape. There are, in fact, 10 dimensions in our universe. 3 of space, 1 of time, and 6 others that either no longer exist or are so small that they have no significant effect on the others. Our whole universe is situated in the 11th dimension, alongside countless other universes. Nobody knows how this dimension came into being, but if anyone is familiar with string theory, they may know that it is the collision of these universes within the 11th dimension that causes a 'big bang', and creates another universe.
All very complicated stuff. :D |
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| enferno |
Proof
or STUF
all scientific explinations need backing, eg. mathmatical equations prooving the existance (or absence) of a theoritical expliniation.
(science major) neener neener. good try though |
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| Boomer187 |
| quote: | Originally posted by enferno
Proof
or STUF
all scientific explinations need backing, eg. mathmatical equations prooving the existance (or absence) of a theoritical expliniation.
(science major) neener neener. good try though |
eh, I highly doubt the scientific proof and formuli could fit on a post here.
I think I will save it for my 14 volume novel. |
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| enferno |
Ah yes, I can see it now.
Boomer & Enferno's Scientific bull
Volume 1 |
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| DJ-Fuq |
| quote: | Originally posted by Streakfury
Ahh, where to start?? :p
Firstly, the universe is, as far as we can tell, finite. However, it is expanding at an ever-increasing rate outwards in all directions. The three-dimensional shape of the universe is thought to be a bubble, but to explain gravity, it has to be thought of as a flat plane.
Imagine holding a sheet out flat, with one person holding each corner, so that it was stretched out flat as tight as it would go. If someone then dropped a large ball onto the sheet, it would cause a slight dip, meaning that any other smaller balls that were on the sheet nearby would roll towards the larger one. This is what happens with bodies of mass in the universe, and is the reason why everything that has a mass is pulled towards everything else.
The larger the ball you put on the sheet, the bigger the dip it would cause, and so the balls that lay further and further away would also be pulled towards the large ball. Again, the same principle applies to the universe. The larger the body, the more gravity it has, and so the further afield it's effects can be felt.
As for the shape of the universe, well I say it's a bubble, but there are many universes that exist parallel to our own that can be any shape. There are, in fact, 10 dimensions in our universe. 3 of space, 1 of time, and 6 others that either no longer exist or are so small that they have no significant effect on the others. Our whole universe is situated in the 11th dimension, alongside countless other universes. Nobody knows how this dimension came into being, but if anyone is familiar with string theory, they may know that it is the collision of these universes within the 11th dimension that causes a 'big bang', and creates another universe.
All very complicated stuff. :D |
lol |
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| davinox |
| einstien figured out what gravity was (objects following the easiest path through the curvature of space-time), and now physicists are attempting to perfect gravity and incorporate it with quantum mechanics. (namely, string/M-theory) |
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| enferno |
String theory has been proven, however, it has 5 possiable equations, some requireing 11 demensions? Woah, wait a second, then they is this sphere, which is our universe, and it is estimaded (using these euqations that came out of some physicists brown spot) that the big bang happened, when one of these 'spheres' collided with another. now they think that the big bang could have been the creationg of our universe, but not for the first time! and they estimate it could happen again! so all of a sudden, we could be crankin one out to a porn, then cease to exist. ??
crazy .
cool if you're high though
nova is a cool show :P |
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| G`Dave |
If the universe has boundary's as you say.. then matter cannot enter or leave the system.. hence.. pressure is a constant.. ie. If you throw a tennis ball into the universe.. it has to come from the universe and it could have never left the universe.
But you are onto something as quantum physics (someone had to say it) suggests there are different levels of a vacume. with different potential energy's. so a vacume is not a vacume.
Now I sound all smart and impressive eh? :stongue: |
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| Streakfury |
| quote: | Originally posted by DJ-Fuq
lol |
I wasn't joking...
;) |
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| dukes |
| quote: | Originally posted by Streakfury
Ahh, where to start?? :p
Firstly, the universe is, as far as we can tell, finite. However, it is expanding at an ever-increasing rate outwards in all directions. The three-dimensional shape of the universe is thought to be a bubble, but to explain gravity, it has to be thought of as a flat plane. |
the universe has 3 possable forms closed, flat and open. open and flat both force the universe to be infinite whereas closed forces it to be finite. recent research (like i said before) has disproved the football shaped (closed) universe false. this does not rule out the possability of a closed universe as the "football shaped" is just one type of closed. the way to find the shape of the universe is to use its density. the density of the universe has only been estimated so far due to the fact we can only estimate the visable universe's density. the currant estimation for the universe actualy sugests a flat universe.
yes the universe is expanding but it is yet unknown whether it will expand forever or if there will be a big crunch this is also due to not knowing the density.
| quote: | Originally posted by Streakfury
As for the shape of the universe, well I say it's a bubble, but there are many universes that exist parallel to our own that can be any shape. There are, in fact, 10 dimensions in our universe. 3 of space, 1 of time, and 6 others that either no longer exist or are so small that they have no significant effect on the others. Our whole universe is situated in the 11th dimension, alongside countless other universes. Nobody knows how this dimension came into being, but if anyone is familiar with string theory, they may know that it is the collision of these universes within the 11th dimension that causes a 'big bang', and creates another universe. |
like i said before there are three possable shapes and curantly it is thought to be flat (a round disc).
there are a few (mathimaticaly) proven versions of the string theory which all work. note they are only mathematicaly proven none have been proven for definite, string theory could yet be a load of noncence. anyway each of these theories have various numbers of extra dimensions that can be for various reasons. multiple dimensions do not equate to multiple universes and vice versa. there is no proof for or against the existance of more than one universe.
yes i have heard of the THEORY of the colision of universes and again it is not proven for or against. |
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| Streakfury |
| quote: | Originally posted by dukes
the universe has 3 possable forms closed, flat and open. open and flat both force the universe to be infinite whereas closed forces it to be finite. recent research (like i said before) has disproved the football shaped (closed) universe false. this does not rule out the possability of a closed universe as the "football shaped" is just one type of closed. the way to find the shape of the universe is to use its density. the density of the universe has only been estimated so far due to the fact we can only estimate the visable universe's density. the currant estimation for the universe actualy sugests a flat universe.
yes the universe is expanding but it is yet unknown whether it will expand forever or if there will be a big crunch this is also due to not knowing the density. |
Yeah I've learnt about that. There's some equation (I forget what it's called) where if the value is equal to 1, the universe is in perfect balance. If it's <1, the universe will collapse, and if it's >1, it will continue to expand forever. Or something like that...
| quote: | Originally posted by dukes
multiple dimensions do not equate to multiple universes and vice versa. there is no proof for or against the existance of more than one universe. |
I never said it did. Of course nobody has proven these things, and they probably never will. These are just assumptions, and calclations based on assumptions.
:) |
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| M1cro5lave |
I don't believe in those who say that the universe is infinite.
It can't just go on forever without any limits, it doesn't make sense at all. Infinite is just a way of expressing something, you can use it in mathematical expressions even though it isn't really a number, but imo nothing is infinite.
I'm not sure if I believe in boundaries either, doesn't make sense at all. It has to be some kind of circulation where you i.e. throw a ball in any direction and it will one day pass by it's first position.
I had a weird conversation once about energy and stuff. We both said that everything is energy and about half an hour later we both said that dimensions has masses too. I have no idea how we managed to make such a conclusion but there's one thing I want to have said with this:
Thinking in these levels can make you go crazy sometimes. So most times it isn't worth even thinking about it, just accept it! |
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