Nav wrote:

Flying Tadpole wrote:


Scott Vernon wrote:

"Martin Baxter" wrote

ahh that'll do but to put it as simply as possible, fresh water is
lighter and thinner than salt so it gets in easier.

Thinner? You have some viscosity data to back this up? More likely fresh

water exhibits a higher osmotic pressure because the difference in water

concentration is greater in fresh than brine. (osmotic pressure being

proportional to the differences in concentration on either side of the
membrane)

Even though Marty has the clap, he still sounds smart.


Or perhaps a faint fairy clap? My memory which may be atfault lo,
these many years, is that "osmosis" and "osmotic pressure" are
labels describing a process which is known to happen and easily
demonstrated and measured, just like gravity and which, just like
gravity, no-one knows what it actually is.

Nav (or others) here's your chance to put the Tadpole down. It's
been a long time since I consciously studied physiology.


Why would telling you someting about science be putting you down? By the
way, osmotic pressure is derivable from first principles (see
thermodynamics).

Oops. Yes it is. My tired brain must have been confusing faint
echoes of membrane transport systems...

--
Flying Tadpole

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