[IM Egdall]

Thanks, Dr Rocket for your enlightening comments.

[Airbrush]

zapatos, on 4 February 2012 - 12:34 AM, said:

Maybe there is nothing to cover up because they haven't been here. If you could pick any time in history to visit, would it be 2012?

Yes, all they need to do is be careful to pick up their beer cans and trash before they leave, whatever the year.

[JohnStu]

Logically (remove all emotions/desires), time machine is definately not possible because if you are in a time machine and you go back in time. The person inside the time machine would go back in time, but not the rest of the world.

[Tres Juicy]

JohnStu, on 29 February 2012 - 02:56 AM, said:

Logically (remove all emotions/desires), time machine is definately not possible because if you are in a time machine and you go back in time. The person inside the time machine would go back in time, but not the rest of the world.

Surely that's the point?

If everyone went back in time, who would know?

[Airbrush]

JohnStu, on 29 February 2012 - 02:56 AM, said:

Logically (remove all emotions/desires), time machine is definately not possible because if you are in a time machine and you go back in time. The person inside the time machine would go back in time, but not the rest of the world.

So how does one person going back in time, and not the whole world, have anything to do with time travel? That is the whole idea, which is somebody (or a select few) going back in time, and hopefully returning to our time to tell about it. If it was possible it would remain on the "above-top-secret" list, and we would probably never know about it.

This post has been edited by Airbrush: 29 February 2012 - 06:56 PM

[JohnStu]

Well, whatever suits your fantasies/imaginations

[Airbrush]

JohnStu, on 29 February 2012 - 07:10 PM, said:

Well, whatever suits your fantasies/imaginations

Yes, it is all just fantasy, but you still have not answered my question. How is time travel definitely not possible? Your explanation was because not everybody in the world is time traveling. How does that matter?

This post has been edited by Airbrush: 29 February 2012 - 07:22 PM

[JohnStu]

Airbrush, on 29 February 2012 - 07:22 PM, said:

Yes, it is all just fantasy, but you still have not answered my question. How is time travel definitely not possible? Your explanation was because not everybody in the world is time traveling. How does that matter?

Ok, hmm. Time travel is not possible because you must be "travelling" to surpass time. And molecules break apart upon reaching certain speed.

if the person does travel pass time however, he, himself would move back into a previous state of himself, not the world around him. I am not saying all those time travel movies are inlogical, but there is a difference between the word "he went back in time (self progress)" than "he went back in timeline".

This post has been edited by JohnStu: 29 February 2012 - 07:37 PM

[Airbrush]

JohnStu, on 29 February 2012 - 07:36 PM, said:

Ok, hmm. Time travel is not possible because you must be "travelling" to surpass time. And molecules break apart upon reaching certain speed.

if the person does travel pass time however, he, himself would move back into a previous state of himself, not the world around him. I am not saying all those time travel movies are inlogical, but there is a difference between the word "he went back in time (self progress)" than "he went back in timeline".

All speed does is slow down the passage of time, not make someone go back in time. So time travel is not a matter of speed. It is a matter of manipulating space-time to either teleport to a distance beyond light speed, or time travel. I don't buy the grandfather paradox, because if somebody could go back in time, they would be in a parallel universe. He might encounter his grandfather at a young age, but killing his grandfather would not affect him at all, since he is from a parallel universe.

[zapatos]

JohnStu, on 29 February 2012 - 07:36 PM, said:

Ok, hmm. Time travel is not possible because you must be "travelling" to surpass time. And molecules break apart upon reaching certain speed.

At what speed do molecules break apart? Why do molecules break apart at all due to speed? Speed relative to what?

[JohnStu]

zapatos, on 29 February 2012 - 08:13 PM, said:

At what speed do molecules break apart? Why do molecules break apart at all due to speed? Speed relative to what?

Whenever something speed up, they usually heat up, not due to the friction of air at high speed but due to the processes that speed up something usually cause tremendous energy aborbtion increasing the unstability of the molecule. Weak bonded molecule like liquids will turn into gas at high temperature. Also at high speed, matters break up on their own even at cold temperature due to massive changes in the behavior of electrons. Atoms in those molecules start losing "charges" of a sudden. The speed I am talking about here is speed relative to complete stillness. High speed, like 800km per second, not 80 km per hour. This has been a brief answer it's a complicated topic that could have a book written on.

This post has been edited by JohnStu: 29 February 2012 - 08:53 PM

[Airbrush]

JohnStu, on 29 February 2012 - 08:52 PM, said:

Whenever something speed up, they usually heat up, not due to the friction of air at high speed but due to the processes that speed up something usually cause tremendous energy aborbtion increasing the unstability of the molecule.....

If a comet travels by Jupiter, it may get "speeded up" and sling-shot away at a tangent (the way Voyager did), but that does not heat up the molecules inside the comet. It may accelerate to a much higher speed, but it only gets more kinetic energy. It does not heat up at all.

[zapatos]

JohnStu, on 29 February 2012 - 08:52 PM, said:

Whenever something speed up, they usually heat up, not due to the friction of air at high speed but due to the processes that speed up something usually cause tremendous energy aborbtion increasing the unstability of the molecule. Weak bonded molecule like liquids will turn into gas at high temperature. Also at high speed, matters break up on their own even at cold temperature due to massive changes in the behavior of electrons. Atoms in those molecules start losing "charges" of a sudden. The speed I am talking about here is speed relative to complete stillness. High speed, like 800km per second, not 80 km per hour. This has been a brief answer it's a complicated topic that could have a book written on.

Can you please supply some references for any of the things you said here?