Show off your scientific background here 2 : The return
- Thread starter Frostblood
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no, but some questions:
so the universe is expanding, right?
like how fast exactly?
our very own little pebble in the sky.
and for that matter how fast could a fullgrown planetary system (or its mother galaxy) "move out"? in percentage of light-speed, please.
plus:
other than red- and blueshift what else indicates an expanding universe?
so the universe is expanding, right?
like how fast exactly?
our very own little pebble in the sky.
and for that matter how fast could a fullgrown planetary system (or its mother galaxy) "move out"? in percentage of light-speed, please.
plus:
other than red- and blueshift what else indicates an expanding universe?
I tried to see if my old thread was still around, but it was not to be. I was going to make a new one, but thanks to ol' Frostblood, ain't got to now.
Cat Fuzz
Qualthwar's Minion. Ph34r!
not much of a sequel.
solve the heat equation with the direlict conditions as boundary conditions.
solve the heat equation with the direlict conditions as boundary conditions.
i got some time.. *breaks out old science books, encyclopedias, calculus, trigonomity books, and some more what nots.
hehe im gonna make a big ass post with a lesson in black holes.
hehe im gonna make a big ass post with a lesson in black holes.
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The universe : as well as red shift, the fact that the big bang happened and now the galaxys are spread apart is another clue. I'm not sure how fast it is expanding, but it is a speed called the Hubble constant i think, which is related to the speed of light, but Qualthwar will enlighten you futher.
Fun chemistry facts
You can make gunpowder from urine.
There is a plant that extracts gold from the earth and you can then own a gold farm.
All the gold in the world could have been extracted from 1 cubic mile of seawater.
You can extract the dna from something with washing up liquid and a blender.
Fun chemistry facts
You can make gunpowder from urine.
There is a plant that extracts gold from the earth and you can then own a gold farm.
All the gold in the world could have been extracted from 1 cubic mile of seawater.
You can extract the dna from something with washing up liquid and a blender.
Considering how the speed of light is the fastest something can move (seemingly mass and maximum speed vary inversely) and that the speed of things is relative (General Relativity) How is it that a given celestial group can have a given speed? And how is it that they are ALL under the speed of light? Would it be that for two objects going in opposite directions, both over one-half speed of light, to "see" the other (according to General Relativity, observer's velocity is nil) going at faster than the speed of light, or slower than lightspeed, but with some weird-ass time bending?
There is no definite measurement of the Hubble constant yet, and there may never be.
As far as light being the fastest thing out there, here’s some stuff to think about:
You can do a search for EPR and find info on the Einstein-Podolsky-Rosen experiment, but I’ll sum it up quickly, because it’s a little difficult to understand. Say you have 2 CDs that are separate, in other words, 2 different units, objects, things…whatever you want to call them. Now tie them together with an invisible string. The string turns the two objects into one object, since you could pick up one CD off the floor and the string would lift the other.
Now, say that string is 20 feet long and you stretch it out. One CD is on one side of a room and the other CD on the other side. Flip one CD over so that one has the label side showing and the other has the read side showing. Now if you go and flip one CD over on one side of the room, the other CD on the other side of the room will flip the other way without you even touching it. If the string was 1000 feet long, the same thing would happen. A million feet long, the same thing; if you flip one CD over, the other CD will automatically flip the opposite way.
Before you bake your noodle trying to figure out why this is, there is something that is far more important: when you flip one over, you will ALWAYS find the other one flipped the opposite way, and the flip happens simultaneously. So as you are flipping one CD over, the other CD is flipping the opposite way. This means that if you were on one side of the universe and flipped one CD over, the other one would flip the opposite way at the same time. How could this be? The universe is huge! This would imply that somehow information is traveling across the universe instantly, not at the speed of light.
The actual experiment is done with particles and instead of “flip” you consider “spin.” So if one particle has spin up, the other would have spin down. You would never find a “particle pair” with both spin the same.
So, with that in mind, is light really the fastest thing in the universe? If information is somehow traveling across 15 billion light-years in an instant, that is sure as hell faster than light.
As far as light being the fastest thing out there, here’s some stuff to think about:
You can do a search for EPR and find info on the Einstein-Podolsky-Rosen experiment, but I’ll sum it up quickly, because it’s a little difficult to understand. Say you have 2 CDs that are separate, in other words, 2 different units, objects, things…whatever you want to call them. Now tie them together with an invisible string. The string turns the two objects into one object, since you could pick up one CD off the floor and the string would lift the other.
Now, say that string is 20 feet long and you stretch it out. One CD is on one side of a room and the other CD on the other side. Flip one CD over so that one has the label side showing and the other has the read side showing. Now if you go and flip one CD over on one side of the room, the other CD on the other side of the room will flip the other way without you even touching it. If the string was 1000 feet long, the same thing would happen. A million feet long, the same thing; if you flip one CD over, the other CD will automatically flip the opposite way.
Before you bake your noodle trying to figure out why this is, there is something that is far more important: when you flip one over, you will ALWAYS find the other one flipped the opposite way, and the flip happens simultaneously. So as you are flipping one CD over, the other CD is flipping the opposite way. This means that if you were on one side of the universe and flipped one CD over, the other one would flip the opposite way at the same time. How could this be? The universe is huge! This would imply that somehow information is traveling across the universe instantly, not at the speed of light.
The actual experiment is done with particles and instead of “flip” you consider “spin.” So if one particle has spin up, the other would have spin down. You would never find a “particle pair” with both spin the same.
So, with that in mind, is light really the fastest thing in the universe? If information is somehow traveling across 15 billion light-years in an instant, that is sure as hell faster than light.
this is exactly what I was building up for. might there be a gazillion of stars out there which we simply can't perceive?
and as of the blue- and red-shift thingy:
isn't it correct, that the farther out stuff is the faster it travels outward?
and if it were collapsing, wouldn't the stuff nearer to the point of collapse collaps back in faster than the stuff further out?
and if we'd be pretty darn far in, wouldn't there still be the same ratio of blue- and red-shift, since we and something else further out both are going in, but we doing so at a faster velocity would make the distance increase and also explain the shift?
and as of the stuff comming in from the opposite side of the "center":
did the big bang blow out exactly the same amount of mass into each and every direction? and if we were near in, wouldn't there have to be some mother of a black hole or something, preventing us to see the light from what comes collapsing straight opposite from us?