capillary action movie

capillary action is shown using an apparatus with decreasing diameter glass tubing. As the tubes get smaller, the water level rises higher. Blue food coloring is added to show the water height very clearly. Shifting of the water shows the water restored to the same heights. Why do the thinner tubes have higher water levels?

[gabby]

anyone else being forced to watch this during quarantine

[RobertsonStriping]

It's due to the adhesion of the water molecules to the glass tubing. The electronegativity bond of the glass tube molecules are greater than the electronegativity bond of the hydrogen-oxygen bond in water. Therefore they stick to the glass (adhesion). When the tube is smaller, the water molecules have more chance of grabbing hold of the glass molecules because of the smaller circumference of the tube. Molecules aren't static, they move/vibrate around. These vibrations allow the water molecules to bump into each other, eventually bumping each other up the tube.

[GulfndeIndustrialServices]

Hi, can I see this clip with some modifications to explain about capilary action. What is ur condition ??

[bamholian]

I know this is old, but what are the internal diameters of each tube?

[krill_inksanity]

I notice when I fill a tube partially with water, the center is always shallower and the edges are alwars higher, I believe this effect becomes stronger with thinner tubes.

[burnard]

The weight/pressure of the liquid in the fat tube causes down force therefore makes the liquid in the thinner tubes rise.

[kevinliang]

Surface tension! The surface tension is small but made obvious in this case.
Basically it prevents (not perfectly) the liquid from escaping into the atmosphere. This tension is related to molecular cohesion. So, a small portion of the water near the contact surface has pressure lower than atmospheric pressure and that small portion has been magnified if the tube is smaller in diameter.

[trilochansingh]

because height of liquid raised in tube is inversly proportional to radius of tube

[trilochansingh]

thats why liqiud rise high in thin tube than in thick

[resqftw]

Ein sehr unspektakuläres und nicht auf den Punkt gebrachtes Video. Jedoch sehr hübsche Finger im Video (nur neben bei erwähnt).
Fazit: Ja ich würde dich Daten, allerdings wünsch ich mir hierbei nicht mehr von Kapillaren zu erfahren.

[robinhoodpapan]

If you watch this in 2025, you're legend