zxrlocost
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| posted on 26/2/07 at 02:36 PM |
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Scientific question for you
Ok this is straight up and I dont know the answer it serves no purpose but why
I have two glasses for my diet coke
one is a clear normal glass, pop goes in little bit of fizz etc
but my other glass is still a normal glass apart from having that smoked effect to the glass
so why when I put my pop in this glass does it fizz up and almost overflow on even the slightest bit of pop its like watching some whacko chemical
reaction
any ideas
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macnab
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| posted on 26/2/07 at 02:40 PM |
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if the smoke effect in on the inside then the rough surface is promoting bubble formation. This is much like the exploding coffee problem.
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pdw709
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| posted on 26/2/07 at 02:42 PM |
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I seem to recall that it has something to do with the surface texture of the glass. A rough texture acts as a seed point for the formation of
bubbles:
Bubbles need an irregularity on which to form. They won't form on perfectly smooth surfaces. The bubbles that form on the sides and bottom of
the glass are actually forming on tiny scratches, dust motes, bits of stuff that did not come off in the last wash.
Try googling around this answer and you should get a more scientific answer!
Phil
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pdw709
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| posted on 26/2/07 at 02:43 PM |
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quote:
Originally posted by macnab
if the smoke effect in on the inside then the rough surface is promoting bubble formation. This is much like the exploding coffee problem.
Damn....you got your answer in whilst I was still composing mine!
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ceebmoj
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| posted on 26/2/07 at 02:45 PM |
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Hi,
short
Basically the bubbles form on the imperfections in the glass more easily so the frosted glass had lots more imperfections so more bubbles
long
The surface of the both glasses has a number of small imperfections in it i.e. the glass is not totally smooth. The gas witch is trapped with in the
fluid wants to escape by forming bubbles. For a bubble to form a very hi localised pressure / concentration of soluble gass must be present i.e. it is
hard for a bubble to from. However if the is a surface imperfection a buble will from on the imperfection and a small seed buble will be trapped.
Hence the next bubble that apeas to from in the same location is infect just another bubble that has grown from the first seed bubble the bubbles will
gro to a critical size then break away from the seed allowing a new buble to form.
Blake
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zxrlocost
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| posted on 26/2/07 at 02:52 PM |
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hi so even though it doesnt feel rough it is actually a not so smooth service
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macnab
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| posted on 26/2/07 at 02:57 PM |
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on the scale that the bubbles form it's like the alps.
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mookaloid
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| posted on 26/2/07 at 03:01 PM |
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Pint glasses in pubs often have a star or the like etched on the bottom of the glass to make bubbles in lager constantly rise to to the top.
Presumably this makes lager drinkers feel better about their pint of fizzy stuff
(living in Masham - home of two proper breweries- makes one such a real ale snob)
"That thing you're thinking - it wont be that."
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nib1980
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| posted on 26/2/07 at 03:02 PM |
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the bubbles are formed by bacteria reacting with the sugar (sucrose ) giving of the the excretion of carbon dioxide. the reason a rough surface glass
gives off more is because it harbours more bacteria. hope that helps (and has you all paranois now)
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macnab
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| posted on 26/2/07 at 03:03 PM |
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An interest and relevant subject if the bubble chambers used to show the paths of radiation. Where visible bubbles form from just small bits of atoms.
I once saw one in action and had it not been bolted down I'd have been away with it cos it was very cool.
[Edited on 26/2/07 by macnab]
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BenB
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| posted on 26/2/07 at 03:05 PM |
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It's all to do with condensation nuclei- IE bits of dirt. If the glass is totally clean you wouldn't get any bubbles.... The rough surface
of the glass attracts dirt hence more bubbles...
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Agriv8
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| posted on 26/2/07 at 03:47 PM |
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quote:
Originally posted by mookaloid
Pint glasses in pubs often have a star or the like etched on the bottom of the glass to make bubbles in lager constantly rise to to the top.
Presumably this makes lager drinkers feel better about their pint of fizzy stuff
(living in Masham - home of two proper breweries- makes one such a real ale snob)
Mookaloid on a list of places Id like to live that has to be no 2 behind Wanaka in NZ.
I'll have to have a run up there in the summer.
Ps you can leave that fizzi stuff for the hoodies  .
Regards
Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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iank
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| posted on 26/2/07 at 04:24 PM |
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The technical term is Nucleation site, the microscopic rough surface triggers bubble formation.
http://en.wikipedia.org/wiki/Nucleation
Try sticking a menthos mint in a bottle diet coke for a more spectacular demonstration (or look it up on youtube if you don't like cleaning )
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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