Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: paul.fr on 22/04/2007 07:56:43

Title: Solid, liquid or gas?
Post by: paul.fr on 22/04/2007 07:56:43

I have a lovely bottle of soapy liquid and enjoy blowing bubbles. When i blow the bubble is it still a liquid?

Title: Solid, liquid or gas?
Post by: lightarrow on 22/04/2007 11:15:19

Quote from: paul.fr on 22/04/2007 07:56:43

I have a lovely bottle of soapy liquid and enjoy blowing bubbles. When i blow the bubble is it still a liquid?

Liquid and gas. The bubble layer is liquid, the air inside is gas...

Title: Solid, liquid or gas?
Post by: neilep on 22/04/2007 13:59:38

I ask the same question when wifey makes soup !

Title: Solid, liquid or gas?
Post by: that mad man on 22/04/2007 17:00:46

Quote from: neilep on 22/04/2007 13:59:38

I ask the same question when wifey makes soup !

LOL

Title: Solid, liquid or gas?
Post by: tony6789 on 09/05/2007 16:53:47

hmmm i wud think that it is a liquid with its surface layer not broken (water has  surface layer i will try to find a site explaining it) but anyway it it just surface layer of water and once that breaks it it done

Title: Solid, liquid or gas?
Post by: JimBob on 09/05/2007 22:52:33

Quote from: tony6789 on 09/05/2007 16:53:47

hmmm i wud think that it is a liquid with its surface layer not broken (water has  surface layer i will try to find a site explaining it) but anyway it it just surface layer of water and once that breaks it it done

A bubble is held together by surface tension. The soap is a surfactant and when I grow up - say I'm 80 years old - I will understand all of the math behind bubbles. As a surfactant soap lowers the surface tension of the water. How this allows bubbles to form I can't figure out even with all of the math given for me. It allows for formation by letting the water spread out more but from that point on, trying to understand the thermodynamics of a bubble, I'm lost.

The link to it is:

http://en.wikipedia.org/wiki/Surface_tension

Title: Solid, liquid or gas?
Post by: tony6789 on 10/05/2007 18:43:13

surface tension thats wat i meant! i knew it was sumthin like that