Last post wins - LOCKED

[RobbieM]

On the subject of geometry

http://en.wikipedia.org/wiki/Klein_bottle

Ah, yes - a 3D version of the Möbius Strip.

[tractakid]

Question is, can you keep liquid inside it?

[RobbieM]

Question is, can you keep liquid inside it?

But of course! But it spills out quite easily.

[tractakid]

But the liquid only touches the outside of the bottle.

[Rhys1995]

Mmmmmmmmmm liquid.

[tubeguru]

But the liquid only touches the outside of the bottle.

But surely the "outside" becomes the "inside"? After all, how can a one-sided shape have an inside or outside?

[RobbieM]

But surely the "outside" becomes the "inside"? After all, how can a one-sided shape have an inside or outside?

I guess it just becomes a 'side' (like the Möbius strip - except that definitely won't hold liquid)

[tractakid]

Does a mobius strip made of sponge hold liquid?

[RobbieM]

Does a mobius strip made of sponge hold liquid?

Hmmm - maybe it does. Likewise, I guess a Klein bottle made of sponge could either hold the liquid better than the glass version, or worse!

[tubeguru]

This is one of the more intellectual threads on the forum of late.

[Starkey7]

Actually though, take a large, hollow ball and imagine that you squish it in a bit, to make a little dent. Fill the dent with a little puddle of water, and again, it's holding water which is only touching its outward side. So that quality is not peculiar to Klein bottles.

[RobbieM]

Actually though, take a large, hollow ball and imagine that you squish it in a bit, to make a little dent. Fill the dent with a little puddle of water, and again, it's holding water which is only touching its outward side. So that quality is not peculiar to Klein bottles.

Now that's a theory that definitely holds water...

[RobbieM]

I have a degree in Physics yet find this all mind-numbingly boring. Probably why I didn't get a very good degree!

Yeah - we're talking more maths and geometry. And philosophy...

[tubeguru]

Anything that sounds sciency is good. I think it looks better without the E, but I don't even know if it's a word.

[tubeguru]

I typed it sans-e to begin with, and using the time tested method of "does it look right" decided to change my spelling.

I did the exact opposite!