Surface tension

[Tdog3nfd]

Watched this in science haha

[64082864642868076838]

I tried this but faild

[TKSparks42]

this guy likes dick

[xfeiri5]

thought it was magic

[OfficerInfusion]

Who is this dude? My chemistry teacher plays his videos!

[tharsi410]

great

[loonylovegood27]

@coolguy701 water can be veeeeerry dangerous if it gets in your eyes

[jazzy6121]

this is wrong ...surface tension plays no role in keeping the watre inside glass ...it is still due to atmospheric pressure

[coolguy701]

why is he wearing googles?

[Truthiness231]

@coolguy701 Duh, you can't do science without goggles and a white lab coat. That's how we know he's a scientist.

[bestkunal]

good n simple to understand

[punkrockerOMG]

my class is doing a unit on surface tension, my science teacher is so strict!!!! help me with the understanding of surface tension

[EellaStudmuffin]

y does the water spills out of the jar when it is tilted?

[Sougandhpavithran]

Nice demonstration.

[Dante121892]

??????? Chemistry is very interesting, but I did not understand his lab experiment! lol I wish to understand this more.

[Artemis519]

@Dante121892 I know! I don't ge this at all! :'(

[jimmyluc]

god bless him.

[mumiemonstret]

I am glad that he uses safety goggles. Imagine if a splash of water would have entered his eyes!

[lokiemonkey]

@mumiemonstret lol!

[TheNinjaBoy13]

cool that neat im gunnu show my family

[itunes530]

dang thats fly right there

[utubemusiccritic]

Rather than tip the inverted jar with the screen lid, take a pump-spray bottle and fill it with some soapy water. Then spray the screen of the inverted jar. That will break the surface tension and make the water flow out. This is because soap molecules interfere with water's hydrogen bonds.

[litewright]

@utubemusiccritic or detergent

[utubemusiccritic]

Nice job. But is it really atmospheric pressure that holds the water in the glass after the cardboard is removed? That is hard to understand, since the glass is inverted, and atmospheric pressure acts downward. An alternate explanation is that the water's adhesive force forms an air-tight seal against the cardboard and around the rim of the glass. In order for water to flow out, air must be able to flow in. In effect, it is a vacuum that prevents the water from flowing out of the glass.

[muddwell]

for a given point the atmospheric pressure is the same in all directions. it only changes with height

[andresordo]

atmospheric pressure acts downward?!

The force that supports the water and the cardboard is the result of the pressure difference between the reduced pressure inside the glass (caused when the glass is turned upside down) and the atmospheric pressure outside the glass.