one track bending in on itself and running back the other way would allow a 2 mile train to fit in a 1 mile tunnel. now a better question...how can a 5 mile train fit in a 1 mile tunnel. muah hahahahahaha.
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Oct-09-2003 04:35
daffodil
don't worry about it
Registered: Jun 2003
Location: brooklyn, usa
seeing as a tunnel is open-ended, the train will fit through it. you didn't say anything about height or width, or the entire train having to fit.
Oct-09-2003 04:35
DigiNut
You kids get off my lawn!
Registered: Dec 2002
Location: Toronto, Self-proclaimed Centre of the Universe
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.
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Oct-09-2003 04:37
Omegasox
AI for MVP
Registered: Sep 2002
Location: Pennsylvania
quote:
Originally posted by daffodil
seeing as a tunnel is open-ended, the train will fit through it. you didn't say anything about height or width, or the entire train having to fit.
She hit it on the head. You never said the whole train has to be inside/under the tunnel at once, so assuming a train can fit through it, it does not matter what length it is.
Oct-09-2003 04:46
Orbax
Supreme tranceaddict
Registered: Apr 2002
Location:
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.
its closer to the actual speed of light but yeah
Oct-09-2003 04:47
DigiNut
You kids get off my lawn!
Registered: Dec 2002
Location: Toronto, Self-proclaimed Centre of the Universe
quote:
Originally posted by Omegasox
She hit it on the head. You never said the whole train has to be inside/under the tunnel at once, so assuming a train can fit through it, it does not matter what length it is.
Actually, he said fit "into" it, not "through" it, so unless it's a riddle that he worded wrong, I don't think that's the answer.
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Oct-09-2003 04:47
DigiNut
You kids get off my lawn!
Registered: Dec 2002
Location: Toronto, Self-proclaimed Centre of the Universe
quote:
Originally posted by Orbax
its closer to the actual speed of light but yeah
Yeah, you're right, I think it's actually something like 4/5 isn't it... I need more sleep.
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Oct-09-2003 04:48
Omegasox
AI for MVP
Registered: Sep 2002
Location: Pennsylvania
quote:
Originally posted by DigiNut
Actually, he said fit "into" it, not "through" it, so unless it's a riddle that he worded wrong, I don't think that's the answer.