Posted by alexandra_k on September 3, 2014, at 17:04:18
In reply to Re: osmosis question » alexandra_k, posted by SLS on September 3, 2014, at 10:54:03
> > or maybe it won't do that. maybe the water level won't be the same in both compartments. i just... that seems very surprising to me. i mean... lakes aren't like that... with nets half way to keep the fishies on one side... i can't see the water level changing in only half if all the swimmers must stay over one side...
> >
> > that just seems bizarre...
>
> Wouldn't the pressure applied across the membrane depend upon the surface areas of the openings in the tube and the weight of the water rather than the height of the displaced water? The height of the water column containing the rock should be higher.
>
> That's the best that I can come up with. Too much for me.
>
>
> - Scottpossibly. i didn't think of that.
i said about dividing the U shaped tube along it's line of symmetry... but of course it's got 2 lines. one of them through the middle so you end up with two J sort of shapes... the other one... if you partition it through the middle from left to right and end up with two U.
perhaps that makes a difference... perhaps the water level will be different in the first way of dividing but not the second.
i wish i had a U shaped tube... dammit...
i suspect you may well be right that the shape matters. to minimise the surface area or something... otherwise... why not use any old container?
poster:alexandra_k
thread:1070688
URL: http://www.dr-bob.org/babble/social/20140828/msgs/1070711.html