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They don't go backwards in time. They go forward in time slower than someone that stays on Earth.
Special Relativity deals with time dilation as it is caused by speed. Travel faster, time goes slower.
General Relativity deals with time dilation as it is caused by the warping of space-time. Time ticks slower near more massive objects.
Sorry, yes, that is exactly what I meant.....I didn't mean astronauts go back in time, but rather that because they are traveling at fast speeds, time slows for them.
General relativity sounds very interesting.....maybe I'll delve into a few good books about.
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Originally posted by gigi@Jan 16 2003, 01:45 PM
Thanks for that Colin....it's been a long time since I read up on it...interesting...you mean 'imaginary' in the sense that we don't KNOW what happens??
No, it is an unfortunate fact that the term imaginary was used for "complex numbers". It's not as exciting as it sounds. I believe it was the mathematician Leonard Euler than coined the term. He coined a lot of them.
Imaginary numbers: The square root of -1 is defined as i. That means that i times i is -1.
i is "imaginary".
The basic point is that if you plug a velocity greater than the speed of light into Einstein's
time dilation equation used in special relativity, you get the square root of a negative number. In that sense, the answer is imaginary. What does that mean? Probably nothing. It probably means the equation isn't true for speeds faster than the speed of light.
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Originally posted by gigi@Jan 16 2003, 01:48 PM General relativity sounds very interesting.....maybe I'll delve into a few good books about.
Thorne's "Black Holes and Time Warps" is supposed to be pretty good but I haven't read it. Hawking's two bestsellers are very readable.
Einstein wrote a book called "Relativity". It's not bad but nor is it great. The Thorne and Hawking books would probably be more interesting.
If anyone wants to learn "the real thing", "Gravitation" by Wheeler, Misner, and Thorne will keep you busy for the next 5 years. My thesis advisor studied under Misner.
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Originally posted by Colin@Jan 16 2003, 09:33 AM Do you believe anything is possible?
For example:
Must there necessarily be a cure for AIDS?
Can man remove violence from his nature?
Will AI robots, indistinguishable from humans, one day live in our homes?
Will we one day time travel? (Why hasn't anyone come back in time to tell us?)
Or are there things beyond man? Limitations imposed by the Universe, omnipotent beings, or other such mouse-like creatures?
As to your questions:
AIDS- yes I believe there is a cure. Only a matter of finding it.
Man-violence- as a species it is possible but EXTREMELY improbable!! Individually, yes. It is quite easy, just a matter of willpower.
AI robots- yes, I believe we will be able to go beyond TNG's Data and get life like androids.
Time travel- I'll quote Captain Kathryn Janeway on this one!!
"Ever since my first day on the job as a Starfleet Captain, I swore I'd never let myself get caught in one of these Godforsaken paradoxes. The past is the future, the future is the past, it all gives me a headache." Captain Janeway(a.k.a. Kate Mulgrew) from the episode Future's End Pt. I
I take the last question to be is there a Q in the universe? Of this I would have to say no. Aliens, yes, beings like the Q, no.
Originally posted by gigi@Jan 16 2003, 01:48 PM General relativity sounds very interesting
mmmm - is that mating season in Arkansas? he he
Quote:
My parents believed that if enough people believed in something, they could make it true. I think they were wrong.
Voodoo practitioners work that angle very well - the faith to make something happen
a Funny aside, was speaking with a non industry friend on the phone and telling them about this ongoing discussion we're having on a adult webmaster chat board - whoda thunk - adult Internet companies and Physics, Essentialism, AI and other assorted interesting topics
It's your fault Colin for starting this thread and being so damn edumakated :P
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Originally posted by Colin@Jan 16 2003, 11:18 AM Strange to read fiction after all these years. Looking around, I only have about 15 fiction books (and a whole library full of non-fiction) but I can't seem to find many non-fiction books I am interested in anymore. Every year's collection of new non-fiction works seems to be largely repetitious.
Which is NOT a good sign for mankind's evolution!! I think porn is to blame as too many people are and not enough time is spent on "worldly" pursuits!!
Last edited by TheEnforcer at Jan 16 2003, 03:06 PM
He was sent back from the distant future to learn firsthand how intelligent early man was. He engages us in stimulating conversation to gauge our degree of advancement. Remember Spanker? Remember how we thought he was hiding in a bunker? IT WAS A RUSE! I overheard Colin in Vegas while he was conversing via wormhole phone with his bretheren in the far future. They sent Spanker to the future to do experiments on him. Poor, poor Spanker.
The good thing is that Serge is next
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Originally posted by Zebra@Jan 16 2003, 03:42 PM Have you people not figured it out yet?
COLIN IS FROM THE FUTURE!
He was sent back from the distant future to learn firsthand how intelligent early man was. He engages us in stimulating conversation to gauge our degree of advancement. Remember Spanker? Remember how we thought he was hiding in a bunker? IT WAS A RUSE! I overheard Colin in Vegas while he was conversing via wormhole phone with his bretheren in the far future. They sent Spanker to the future to do experiments on him. Poor, poor Spanker.
The good thing is that Serge is next
shazbot
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Originally posted by Zebra@Jan 16 2003, 12:42 PM Have you people not figured it out yet?
COLIN IS FROM THE FUTURE!
Okay....whew! That makes a lot more sense. I was just about to ask which brand of coffee he was drinking - I think mine has failed me. *slaps self in face* Wake up brain! Wake up!
I guess I'm more of the "hippy crowd" way of thinking - I think *anything* is possible. Just look at how far the world has progressed just in our own lifetimes in the ways of technologies and medical advancements - that alone should give hope to the possibilities of the future.
this was all over the news when it happened. i think that these type of things are not really significant when people cannot relate to it, or when it has no clear application that will affect or more importantly, improve lives.
the details of this experiment is pretty much impossible to understand without a solid grasp of quantum physics.
Four years ago, this was done with a single photon.
JR, your comment, "these type of things are not really significant when people cannot relate to it, or when it has no clear application that will affect or more importantly, improve lives." is so right on.
There are all kinds of amazing scientific research papers being published every year that won't appear in the newspapers or that do and no one cares. Science advances become known much faster when they are marketed well. Without someone taking the time to explain the papers in English, they do not become very well known. If a story is not picked up by the Associated Press or Reuters, it may sit dormant for years - or more likely forever. A good marketing scientist will tell a good story
What living scientists can most of us name? They are probably all best-selling science authors. Our personal lists of known scientists will not usually be of the best ones but rather they will be of the best science writers and the ones that know how to market themselves and are good at politics.
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Originally posted by Rolo@Jan 16 2003, 10:35 AM Human natur says "no limits", so it could be that humans are the once who will try and break the limitations imposed by the Universe with devastating
consequence, and we will serve as a warning to others, if there will be any left...
How can there be limitations if they can be broken?
Why must the results be devastating?
"Warning to others?" What are you afraid of and why?
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Originally posted by BigCash@Jan 16 2003, 11:20 AM Human like AI technology and artificial brains are still a long way from ready and I don't see it being ready within the next 50 years.
But do you believe it is possible and that it will happen? Assume 1000 years of progress (no catastrophes), will it likely happen? What would you bet on 100 years?
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To try to get proof have considered going ghost hunting
If I can find ghosts that would be proof of a life energy ?
Call it energy, life energy...whatever you like....'energy' is already proven to exist. Also, it's a proven fact that energy never dies...it only transforms.
Take for example electricity. From the dam to the plug in your house, through your lamp and into the light bulb. The energy of water has now been transformed into light. And as you know light goes on forever....
In physics, energy is just the ability for a system to do work. Work is just force x distance.*
I don't really know what people mean when they use the term energy in a sentence like "I believe god is an energy force" or "there is a 'life energy' ". I mean, I vaguely understand the idea but no one seems to have a precise definition that would allow someone to evaluate it. Whatever is meant, it does not seem to be the same thing as the physics definition.
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*If I hold a rock a certain distance off the ground that rock has "gravitational potential energy". I can turn that potential energy into kinetic energy by dropping it. As it drops the rock increases in kinetic energy (it moves faster). The potential energy drops by an equivalent amount. At the end we could have an apparatus that the rock hits and transforms that kinetic energy into electrical energy. If someone is willing to stand there all day and drop rocks, we can power a small motor with it.
Now, I have no idea what this has to do with ghosts or what might be meant by energy as it relates to ghost. Of course, I've heard these things all my life and continue to ask people and no one has yet satisfactorily explained it to me.
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01-16-2003
and not enough time is spent on "worldly" pursuits!! 
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