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DigiNut
You kids get off my lawn!



Registered: Dec 2002
Location: Toronto, Self-proclaimed Centre of the Universe
Re: Re: Lets see who is smart here.

quote:
Originally posted by drizzt81
as long as the tunnel is high enough, there is no problem.. just drive

No.

Read above... the question wasn't a lame riddle, it was about relativity.


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Old Post Oct-09-2003 19:06  Canada
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DrUg_Tit0
e^(i*pi)+1=0



Registered: Nov 2002
Location: Zagreb, Croatia

quote:
Originally posted by Streakfury
If 2 typists can type 2 pages in 2 minutes, how many typists would it take to type 18 pages in 6 minutes??


54

Anyway, back to the original question. We all know that the objects which are traveling near the speed of light appear to increase in length. So what we need to do is to move the tunnel back and forth at the speed very close to that of light, and the train will constantly be inside.


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Old Post Oct-09-2003 19:11  Croatia
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DrUg_Tit0
e^(i*pi)+1=0



Registered: Nov 2002
Location: Zagreb, Croatia

quote:
Originally posted by DrUg_Tit0
54

Edit: oops, I misread the question. 6 is the correct answer.


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Old Post Oct-09-2003 19:13  Croatia
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DJ Charlie
ARMIN ADDICT



Registered: Feb 2002
Location: Montreal, Canada




What if you look from in front of the tunnel... for your eyes it looks like the train as completely fit into the tunnel cause basicly you can't see the back of the train. It doesn't matter how long the train is.

Old Post Oct-09-2003 19:34  Lebanon
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Azz3D
Asobi Seksu'd



Registered: Jul 2002
Location:

quote:
Originally posted by sash
when is a car, not a car?


When you're humping in the backseat. Oooh yeah baby!!!


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Old Post Oct-09-2003 19:59  Yugoslavia
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drizzt81
Professional Lamer



Registered: Nov 2001
Location: GTA #1 - At work

quote:
Originally posted by DigiNut
Well, I've heard this kind of question in terms of the relativity paradox.

If the train is travelling at half the speed of light, then the train is only 1 mile long in the rest frame of the tunnel.

It doesn't exactly work out that way though, because once the train stops then it's again 2 miles in terms of the rest frame. It fits inside while it's moving because it's compressed, but would not fit after it stops.


sorry, but wouldn't the train appear LONGER, since it is moving faster?

quote:
Originally posted by DrUg_Tit0
anyway, back to the original question. We all know that the objects which are traveling near the speed of light appear to increase in length. So what we need to do is to move the tunnel back and forth at the speed very close to that of light, and the train will constantly be inside.


i thought so too.. or is that my comic book based misconception: faster = longer


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Old Post Oct-09-2003 20:19  Germany
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drizzt81
Professional Lamer



Registered: Nov 2001
Location: GTA #1 - At work

quote:
Originally posted by DrUg_Tit0
Edit: oops, I misread the question. 6 is the correct answer.


yup. 2 minutes/ page for each typist


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Old Post Oct-09-2003 20:23  Germany
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LiveTheDream
Senior tranceaddict



Registered: Sep 2003
Location:

quote:
Originally posted by drizzt81
yup. 2 minutes/ page for each typist


Hey DrUg_Tit0 just copyed of my answer.

Old Post Oct-09-2003 22:03  England
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DigiNut
You kids get off my lawn!



Registered: Dec 2002
Location: Toronto, Self-proclaimed Centre of the Universe

You people are incorrect. Things don't expand when they go fast like "the flash" does in his traditional blur of motion. As objects approach the speed of light, they contract.

http://www.astro.virginia.edu/~jh8h...ons/quest7.html
quote:

Question:
OK, maybe I see why clocks should run slow, but why must there also be a length contraction?

Answer:

The second postulate of relativity requires the speed of light to be the same in all reference frames. Since speed is a change of distance divided by a change of time, if time changes (time-dilation) then length must change too to maintain the constancy of light.
A question sometimes arises: is this contraction real or just an optical illusion of some sort? The answer it is real in every sense. A measurement of something moving will be shorter than of that same object at rest according to every possible test.


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2009-06-18 - DJ Annoying @ People Need To Know Where I'll Be
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2048-06-66 - Spastic & Whocares Although I'm Actually Flattered
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Old Post Oct-09-2003 22:20  Canada
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