Capillarity

[Gabriele]

So you say that if we have a capillar that can hold 10cm of water by capillarity action,we cut it in 2 parts and we let act the weight of the superior half capillar,the level dowsn-t decrease...right?

Where does the weight of the upper column of water go? On the walls of the lower capillar even if the weight acts on the lower column of water? Does the superficial tension drop the weight to the walls of the capillar? What happen is we cut a 99% of the height of the capillar and let the weight acts on re reimanent 1%? It makes me think....

[profitis]

Its like if you stick a capillar underneath bowl instead of top of bowl..water will pass through if weight-pressure-force is sufficient to disengage skin-force at bottom of capillar tube.if it insufficient pressure then some water should remain in bowl ontop?maybe you are right it should be easy to chek experiment like this.

[profitis]

if we take two solutions of equal vapour pressure but different weight solids dissolve in them we will get different heights in capillars.different heights,same vapour pressure,signal for violation of 2nd law thermodynamic.vapour will flow in the heavier: NaCl vs BaCl2(barium chloride)

[Gabriele]

I don't see discrepancy in the behavior with the 2 salts... simply one is heavier so the level of water is lower... where is the discrepancy?

[profitis]

Like this.barium chloride solution is heavier than sodium chloride solution.height A is where it will be,height B is where it should be.the level will differ btween NaCl vs BaCl2 solut at same vapour pressure ontop.water vapour will condense continually ontop,level will remain same.google: surface tension vapour pressure