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/sci/ - Science & Math

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2732880 No.2732880 [Reply] [Original]

We don't know if the universe is compact; it's conceivable that if you travel in a straight line, you'll eventually end up where you started.

If moving in a straight line can return you to where you started, it would also theoretically be possible to build a lever that spans the entire universe and reconnects to itself.

Archimedes said that with a long enough lever, he could move the earth.

So what would happen when this universe-spanning, closed-loop lever is rotated about some fixed point?

I just proved the universe isn't compact, and I'm not even a cosmologist

pic unrelated but it always amuses me

>> No.2732902

We're like 98% sure the universe is infinitely flat.
You will not loop around on yourself.

>> No.2732903

>I just proved the universe isn't compact, and I'm not even a cosmologist
Logic is one thing, experimentation another.

Build the lever.

>> No.2732908

>>2732880
> I just proved the universe isn't compact, and I'm not even a cosmologist

No, you hypothesized that the universe isn't compact. Now you have to give physical proof.

>> No.2732938

proof is flawed as a lever has two ends and a fulcrum

yours has one end

even if you attached it some way, it is still the same mechanically as a couple of levers all pushing each other that i could build on my kitchen table. so what, it proves nothing.

>> No.2733262
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2733262

>>2732938
Okay, maybe a lever isn't the best term. But if you take a rod and rotate one end of it, the other end of it also rotates, but by a greater distance. If you have a rod that connects to itself, then you can think of a point on it as being both ends at once. So if you rotate it, will that point move a slight amount or a large amount? It can't be both, so a straight, self-connecting rod can't exist, so the universe isn't compact. Q.E.D.

>> No.2734662

bump

>> No.2734847

bump dammit

>> No.2734955

>Okay, maybe a lever isn't the best term. But if you take a rod and rotate one end of it, the other end of it also rotates, but by a greater distance

what? define the axis of rotation, because this makes no sense for multiple interpretations of your statement.

>> No.2735621

bumping

I swear there's an interesting question in here, /sci/ just hasn't noticed it yet.

Come on /sci/

>> No.2735638

>>2733262
You just redefined a lever, on its side.

>> No.2735645

>>2733262

there is no material that is strong enough to be a rigid, infinite amount that it would take to span the universe and end up back here again. Fucking told with jelly on top.

>> No.2735659

>>So what would happen when this universe-spanning, closed-loop lever is rotated about some fixed point?

It would probably hit a lot of shit.

Or, you would need a force great enough to rotate the entire universe.

>> No.2735773

>>2732880
i suddenly thought of tiper cylinder....
plausiable?

>> No.2735795

The universe is infinite as far as we know. This has theoretically been proven. Saging thread. Fun idea but is not possible