Why does this happen to water?

[kuk]

Could someone please explain how this happens:

Water

I know it has something to do with superficial tension of water, but why does this lead to the bulged format?

Thanks,
Kuk

 

[radioouman]

Surface tension... that's a meniscuss..... Probably spelled that wrong...

 

[PowerMacG5]

Adhesion between the water and the cup, cohesion between the water molecules.

 

[fitz4521]

magic

 

[oniq]

Originally posted by: fitz4521
magic

Yeah... don't you know David Copperfield is in your cup?

 

[ajpa123]

This is one of the topics that excited me as a kid (before i hit puberty by the way)

The other topics were capillary action and photoshynthesis, why the sky is blue...

oh yeah, and then (during puberty), i loved my 'how things work book' that described how an engine works with its 4 steps:

suck, bang, squeeze.. blow.. lol

lol

AJ.

 

[ajpa123]

Originally posted by: ajpa123
This is one of the topics that excited me as a kid (before i hit puberty by the way)

The other topics were capillary action and photoshynthesis, why the sky is blue...

oh yeah, and then (during puberty), i loved my 'how things work book' that described how an engine works with its 4 steps:

suck, bang, squeeze.. blow.. lol

lol

AJ.

oops, thats suck, squeeze, bang blow... lol

 

[PowerMacG5]

Originally posted by: ajpa123
This is one of the topics that excited me as a kid (before i hit puberty by the way)

The other topics were capillary action and photoshynthesis, why the sky is blue...

oh yeah, and then (during puberty), i loved my 'how things work book' that described how an engine works with its 4 steps:

suck, bang, squeeze.. blow.. lol

lol

AJ.

Capillary action is due to adhesion between water and whatever it is moving up.

 

[ragazzo]

"Surface tension is the force at the surface of a liquid due to adhesive forces of the liquid molecules for the walls of the container and the attractive forces of the molecules of liquid for each other. When the adhesive forces of the molecules for the walls of the container are greater than the attractive forces between the liquid molecules, then the surface of a liquid confined to a narrow diameter container will curve downward forming a concave surface called a meniscus. Most important examples are water solutions. The water adheres to the surface of the container greater than the water molecules are attracted to each other. We do not see this downward curvature when the surface area is great, but if the liquid is confined to a small diameter tube such as a graduated cylinder, pipette, burette, or volumetric flask then the surface tension is great enough to noticeably distort the surface. In such cases when we are trying to read the liquid surface level such as measuring a liquid in a graduated cylinder, then one should make the reading at eye level and the lowest curvature of the meniscus should be read.

When the adhesive forces against the walls of the container are less than the intermolecular forces, then the surface of a confined liquid will bulge upward slightly forming a convened surface. Again, such a surface should be read at eye level and the topmost part of the surface should be read. Surface tension helps to explain why the feathers of a duck can help the duck float on water."

 

[WinkOsmosis]

Originally posted by: ajpa123
This is one of the topics that excited me as a kid (before i hit puberty by the way)

The other topics were capillary action and photoshynthesis, why the sky is blue...

oh yeah, and then (during puberty), i loved my 'how things work book' that described how an engine works with its 4 steps:

suck, bang, squeeze.. blow.. lol

lol

AJ.

Yeah I liked those books too. GOod times.

 

[WinkOsmosis]

The water wants to get closer to God. If this isn't proof of the existence of Our Lord, I don't know what is.

 

[Yossarian]

it is a reverse meniscus.

 

[Evadman]

Originally posted by: PipBoy
it is a reverse meniscus.

Only if it was mercury.

 

[GtPrOjEcTX]

Originally posted by: ragazzo
"Surface tension is the force at the surface of a liquid due to adhesive forces of the liquid molecules for the walls of the container and the attractive forces of the molecules of liquid for each other. When the adhesive forces of the molecules for the walls of the container are greater than the attractive forces between the liquid molecules, then the surface of a liquid confined to a narrow diameter container will curve downward forming a concave surface called a meniscus. Most important examples are water solutions. The water adheres to the surface of the container greater than the water molecules are attracted to each other. We do not see this downward curvature when the surface area is great, but if the liquid is confined to a small diameter tube such as a graduated cylinder, pipette, burette, or volumetric flask then the surface tension is great enough to noticeably distort the surface. In such cases when we are trying to read the liquid surface level such as measuring a liquid in a graduated cylinder, then one should make the reading at eye level and the lowest curvature of the meniscus should be read.

When the adhesive forces against the walls of the container are less than the intermolecular forces, then the surface of a confined liquid will bulge upward slightly forming a convened surface. Again, such a surface should be read at eye level and the topmost part of the surface should be read. Surface tension helps to explain why the feathers of a duck can help the duck float on water."

ding ding. the winAr!

 

[kuk]

Thank you very much!

 

[Kadarin]

Originally posted by: WinkOsmosis
The water wants to get closer to God. If this isn't proof of the existence of Our Lord, I don't know what is.

*shudder*

Thought you were LordMagnusKain and were actually being serious there for a second..

 

[rh71]

Are you sure howstuffworks.com doesn't have a say in this ?

 

[CarlKillerMiller]

Originally posted by: oniq

Originally posted by: fitz4521
magic

Yeah... don't you know David Copperfield is in your cup?

I guess that means that fishing line holds it up.

 

[CraigRT]

i always thought that was kinda cool too

 

[Goosemaster]

Originally posted by: WinkOsmosis

Originally posted by: ajpa123
This is one of the topics that excited me as a kid (before i hit puberty by the way)

The other topics were capillary action and photoshynthesis, why the sky is blue...

oh yeah, and then (during puberty), i loved my 'how things work book' that described how an engine works with its 4 steps:

suck, bang, squeeze.. blow.. lol

lol

AJ.

Yeah I liked those books too. GOod times.

Damn straight