![[challenge entry]](/images/board_posticon_c.gif "Challenge Entry: When the laws of physics pack up"){kind=small}
Aargh - osmotic anarchy!
EDIT - where it says, 'permeable membrane', I actually meant, 'selectively (or partially) permeable membrane'.
Honest, I did, Guv.
From the When the laws of physics pack up challenge. See all 348 entries (closed)
(
friendlyfire,
Fri 18 Jun 2004, 23:35,
archived)
Shirleyit's a semi-permeable membrane?
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Noit happy baby orangutan,
Fri 18 Jun 2004, 23:42,
archived)
*googles*I hate you
My A level is useless anyway
(D)
and it was a couple of years ago
(,
Fri 18 Jun 2004, 23:45,
archived)
My A level is useless anyway
(D)
and it was a couple of years ago
Never!I have a career!
(career plan:
1.Get enough cash for 6.6ltr pontiac transam
2.Drive into sunset)
(,
Fri 18 Jun 2004, 23:49,
archived)
(career plan:
1.Get enough cash for 6.6ltr pontiac transam
2.Drive into sunset)
In something biological?If so can I have it?
( Noit happy baby orangutan,
Fri 18 Jun 2004, 23:50,
archived)
HA HA HAAs if I would get a job in somat like that.
Nay. Merchant Navy. *makes "rock" hand sign*
(,
Fri 18 Jun 2004, 23:52,
archived)
Nay. Merchant Navy. *makes "rock" hand sign*
That's what I thought tooIt's etched into my very soul
(
Hankster,
Fri 18 Jun 2004, 23:45,
archived)
I agree withsemi-permeable membrane.
*Also A Level Biology*
(*Also A Level Biology*
hoifbjifbef,
Fri 18 Jun 2004, 23:46,
archived)
Isn't O LevelGCSE Level nowadays. Or am I being silly?
( hoifbjifbef,
Fri 18 Jun 2004, 23:49,
archived)
Sort ofWe had CSE's And O levels. Then there was A's in sixth form. But a CSE Grade 1 pass was the same as an O Level grade 3.
Or something
It was a very long time ago.
(Or something
It was a very long time ago.
Hankster,
Fri 18 Jun 2004, 23:51,
archived)
Fucking hellIt's like an old folks home here.
*had a GCSE today :(*
(*had a GCSE today :(*
Noit happy baby orangutan,
Fri 18 Jun 2004, 23:53,
archived)
Ahahahaaaa!Out opinion over-rides yours because yours was GCSE coursework which counts for nothing... And ours was A Level 'actual' work. So there! :-P
( hoifbjifbef,
Fri 18 Jun 2004, 23:56,
archived)
Bless...You just sit down in that comfy arm chair.
*pas head and feeds mushed banana*
(*pas head and feeds mushed banana*
hoifbjifbef,
Fri 18 Jun 2004, 23:54,
archived)
Science is cool!But they need funkier outfits...
(
Captain Nostril,
Fri 18 Jun 2004, 23:43,
archived)
Explanation of Osmotic Activity.If the water potential on the left hand side was affeted by an osmotiaclly active substance such as salt thus causing the water potential to fall below zero, and the substance on hte left hand side was pure water thus having a water potential of 0, water would, move, by osmosis from the left to the right hand side across the *partially permeable* membrane.
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siredsmithjr,
Fri 18 Jun 2004, 23:40,
archived)
I was with youup until the word "Explanation"
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Chrico is a bounder and a cad,
Fri 18 Jun 2004, 23:41,
archived)
Which I didn't do.I did A Level Physics. Nothing to kill, but at least I got to play about with Knex Rollercoasters (great for demonstrating Gravitational Potential Energy, y'see)
( Chrico is a bounder and a cad,
Fri 18 Jun 2004, 23:44,
archived)
no one likes a smart arse.woo!
Linbox has a serious dunk habit,
Fri 18 Jun 2004, 23:42,
archived)
can someone explain this to me?I vaugely remember my biology GCSE and osmosis was something about water being absorbed into cells. I also remember stuff about the cell wall breaking down if there was too much water - but beyond that I'm lost.
(
rob,
Fri 18 Jun 2004, 23:41,
archived)
It's to do with concentration gradients.Water moves across the membrane from an area of low concentration (of sugar or whatever) to an area of high concentration, in an attempt to equalise.
Quite why it does this I can't remember...
(Quite why it does this I can't remember...
supermoore: HUNG,
Fri 18 Jun 2004, 23:42,
archived)
Pfft, it's not like it THINKS about it or anything,it just does. Entropy in action.
(,
Fri 18 Jun 2004, 23:46,
archived)
Osmosisis the transfer of water from a high water concentration to a low water concentration across a semi-permeable membrane.
Like in cells and that.
(Like in cells and that.
Mystery_Bob,
Fri 18 Jun 2004, 23:43,
archived)
The jokeis that the solute particles shouldn't go from left to right. However, This will occur
if a pressure greater than the osmotic pressure of the right-hand solution on the membrane were applied to the solution on the left.
(if a pressure greater than the osmotic pressure of the right-hand solution on the membrane were applied to the solution on the left.
DogHorse plop,
Fri 18 Jun 2004, 23:44,
archived)
thats meant to be the jokebut clearly the joker doesnt have a comprehensive knowledge of biology.
( siredsmithjr,
Fri 18 Jun 2004, 23:45,
archived)
In the picture it's occuring in the wrong direction,hence anarchy.
( supermoore: HUNG,
Fri 18 Jun 2004, 23:45,
archived)
I thinkin this crazy world of no physics, the water is actually moving across to the higher water concentration.
( Mystery_Bob,
Fri 18 Jun 2004, 23:45,
archived)
So...If the left side has no salt and the right side has loads of salt, then the higher concentration of water is always on the right side, because the salt reduces its concentration.
( siredsmithjr,
Fri 18 Jun 2004, 23:45,
archived)
Basicallythe tendancy is for the concentration to attempt to balance across a semi permeable membrane. Water flows from the side with the lowest concentration of solute (dissolved stuff) to the side with the highest, thus diluting it. Bringing the psi values (water potential) closer together.
Water potential can be considered as the ratio of water to solute.
(,
Fri 18 Jun 2004, 23:46,
archived)
Water potential can be considered as the ratio of water to solute.