If you opened a new bottle of coke in space..

[bugjuice]

which way would the bubbles go? :scratch:

[froggyfrenchman]

Cue twilight zone music

[Colapop]

The bubbles would travel to the surface with the least pressure. In space that would mean they would go to the closest surface.

[bugjuice]

but aren't bubbles, in effect, fighting gravity?

[Waylander]

that is way too deep for a saturday night.

[MidnightMike]

Im my mouth :blah:

( thats about as deep as ill go on saturday. )

[Edbear]

My brain is tired! I should know exactly what happens but I can't think...:yawn:

[bobsmith]

The bubbles would travel to the surface with the least pressure. In space that would mean they would go to the closest surface.

I second that...

If you want an easier way of thinking about it... what's really happening, is the liquid part of coke (mostly water) is simply trying to minimise the surface area. (ie the same reason water forms round droplets on earth and form spherical blobs in space), since the "bubbles" are increasing the surface area of the liquid, the liquid will move so that the bubbles appear to move towards the nearest surface so that the increase in surface area due to the bubbles can disappear as quickly and efficiently as possible.

[bugjuice]

mmmmmmm still don't buy it..

there's no gravity to fight which way they're going, so they could go any direction. But then the bubbles would need to be forced in that direction. But if there's no force, then what's going to make them move?

[boomer]

go and have a shag mate.. that'll cure the restless mind!

[Magua]

I too should know this one, beer........inhibiting......think.

[FROSTY]

jeyzus you guys need really really badly to get laid

[Macktheknife]

which way would the bubbles go? :scratch:
This is a trick question right?
If you opened the bottle in space, (vacuum) the gas expanding would force both the bubbles and the liquid from the bottle and then the bubbles would expand towards the outside of the droplets formed.
I think... therefore Im dangerous.

[bugjuice]

we need to email this to NASA..
I'll go up and have a look..

[WINJA]

the coke would just foam out the opening

[James Deuce]

Lol! "Fighting Gravity" Lol!!!

All you have gentleman, is a bottle rocket.

It's bottled at one atmospheric pressure to start with. As soon as you turn the cap enough to release that pressure, you are going to end up spinning at some godawful velocity, and probably a complex series of vectors as well, because it will immediately spray out through the path of least resistance before you get the cap fully off.

Assuming you could direct and meter the flow, you could use it for propulsion.

All this assumes that you can keep it warm enough to stay liquid. The bubbles will just end being CO2 trapped in a frozen H20/C8H10O4 solution. It's -273C in the shade out there folks.

[WINJA]

so the bottle would be cracked then cause frozen bottles of coke crack

[James Deuce]

If it was glass it would probably explode violently. If it was plastic it depends whether or not the plastic reaches the minimum temperature that it can remain plastic at before the solution inside freezes solid.

If it was a can it would get as close to spherical as it could.

[mini_me]

mmmmmmm still don't buy it..

there's no gravity to fight which way they're going, so they could go any direction. But then the bubbles would need to be forced in that direction. But if there's no force, then what's going to make them move?

rather than that bubbles fighting against think of the coke displaceing the position that the bubbles are in pushing them up...so if thats the case then no gravity mean the coke wont force its way down - so the bubbles won't go anywere in particular...
that hurt my head :(
chris

[Magua]

It's -273C in the shade out there folks.

I think not, that's technically impossible. According to my lecturer atleast.

[sexy beast]

trick question
answer: NASA doesnt allow coke in space. only Nasa approved food and drinks....

[James Deuce]

I think not, that's technically impossible. According to my lecturer atleast.

He's right of course, but O degrees Kelvin is the coldest it can ever get. Sue me. ;)

There's a huge range of field, gas, particle, and wave interactions that raise the temperature of a local cubic metre of space, but you are welcome to calculate the temperature of the night side of the Earth at apogee over the equator.

I wouldn't know where to begin.

[James Deuce]

trick question
answer: NASA doesnt allow coke in space. only Nasa approved food and drinks....

Tang and Muesli bars. Yay.

[Karma]

trick question
answer: NASA doesnt allow coke in space. only Nasa approved food and drinks....

give it a year...

"welcome to moon mcdonalds... you want fries with that coke?"

[Winston001]

[LEFT]Lol! "Fighting Gravity" Lol!!!

All you have gentleman, is a bottle rocket.

It's bottled at one atmospheric pressure to start with. As soon as you turn the cap enough to release that pressure, you are going to end up spinning at some godawful velocity, and probably a complex series of vectors as well, because it will immediately spray out through the path of least resistance before you get the cap fully off.

Assuming you could direct and meter the flow, you could use it for propulsion.

Agreed. Good fun. :blah:


It's -273C in the shade out there folks.

Err....no. The cosmic background radiation is about 2.7K which is -270.7C. But hey - who's counting. :innocent:

[James Deuce]

Geez you're a nerd Winston ;) 0K is actually -273.15C, so you're a touch off. Oh yeah, we're not counting. :D

[Winston001]

My bad. I feel such a bottom-feeding lowlife now Jim. :blip:




But I really enjoyed your question. Tell me - what is a Russian Thistle more commonly known as?

[Indiana_Jones]

Herpes?

-Indy

[Winston001]

LOL thats good. Gotta remember that.

[FzerozeroT]

The bubbles would go to the surface (slowly) in any direction beause of gravity, EVERY bit of mass has gravity (to atomic scale), the universe is ghey like that.

[sAsLEX]

Err....no. The cosmic background radiation is about 2.7K which is -270.7C. But hey - who's counting. :innocent:

Depends where you are as well
<img src= http://timeline.aps.org/APS/resources/85_06a.jpg>

[James Deuce]

I wonder if Dark Matter absorbs all radiation in interstellar space?

[James Deuce]

Actually I don't reckon there'd be any bubbles. CO2 becomes a solid at about -80C IIRC.

[Mr. Peanut]

The CO2 would violently escape from the solution spraying coke in all directions - why?

Space has no pressure to hold the gas molecules together. Thats why CO2 doesn't escape from the bottle when the cap is closed. The pressure stops it from escaping from the solution.

When you open the cap the pressure is lowered and the CO2 escapes. Space has no pressure at all, so the CO2 pretty much fucks off and does what it wants :D

Oh and the boiling point of water decreases as pressure decreases, so that would probably vapourise as well, one assumes that said astronaut would not be able to open the bottle at -273 degrees :D

That said some ice would probably form for a small period of time as the evaportation would cause the temperature of the water to drop. But the coke explodes either way.

Best to drink it before you leave the shuttle. :drinknsin

[James Deuce]

The CO2 would be dry ice before you got the cap off.

The reaction you're talking about is because of the ambient pressure that the Coke is bottled at.

[Mr. Peanut]

The CO2 would be dry ice before you got the cap off.

The reaction you're talking about is because of the ambient pressure that the Coke is bottled at.

This is assuming that this part of space is cold. Either way that shit is gone once the cap is opened. IMHO.

[Lazy7]

are you talking about in a vacuum? or just in a weightless environment?

in a vacum the bubbles would completely expand and pop out of the coke.

if just in a weightless environment - the bubbles would stay inside the coke and float around with it, only popping out if the bubbles of liquid coke moved in such a way as to expose the bubbles of air to the edge/surface of the liquid.

[fozz rock]

just put down the bong and have a sleep:doobey:

[TwoSeven]

Depends if the bottle was opened inside the space ship (in an atmosphere) or outside of the ship (in a vacum).

My theory is.

For the latter, no bubbles would occur because all of the the liquid (including the coke) would almost instantly boil away and the gas would distribute itself evenly in space.

For the former, I think it depends on the pressure inside of the space craft vs that inside the bottle. I think gas always distributes to the area of least pressure, that would be the neck of the bottle. So I suspect that the CO2 bubbles would move towards the neck even if you held the bottle upside down (which is possible because there is no gravity to pull the liquid out of the bottle). Once the gas is outside the bottle, I think it would distribute in the normal manner (btw. I think that the bubbles only exist because the gas is in a more dense liquid (gas is compressed), once it escapes the coke, I suspect it would become gas vapour).

Another more interesting question - what happens if you open the bottle of coke in a compression chamber when the pressure outside the bottle is higher than the inside ?

[Mr. Peanut]

The bottle crinkles or the cap breaks. The gas would not escape the solution.

Nothing would happen.

On the other hand.





WHO GIVES A SHIT????????

[Hitcher]

but aren't bubbles, in effect, fighting gravity?
Silly man. No, gravity has nothing to do with bubbles in Coke or any other aerated beverage. It's all about pressure. Cue Haldanes Law.

[TwoSeven]

Well I should change my post, it seems CO2 bubbles are not under pressure (as I thought they were). So the bubbles stay in the coke.

Here (http://science.nasa.gov/headlines/y2001/ast21sep_1.htm)

[Winston001]

I wonder if Dark Matter absorbs all radiation in interstellar space?

No. If it did we wouldn't see anything. No photons = no visible stars.

If you mean the cosmic background radiation, we wouldn't detect it if Dark Matter soaked it up.

[Skyryder]

No. If it did we wouldn't see anything. No photons = no visible stars.

If you mean the cosmic background radiation, we wouldn't detect it if Dark Matter soaked it up.

I came across a site where two astrophysicists were conducting experiments to prove that dark matter exists. Just can not find the link now.

So you drink the coke, burp........what happens??

Skyryder

[R6_kid]

ffs bugjuice... look what you've started.

[sAsLEX]

ffs bugjuice... look what you've started.

Now if it were spinning would it go to the left or the right when you push on the left handle bar?