🚀 go-pugleaf

clwu@Uz.nthu.edu.tw (Ching-Long Wu (PHYS U790315)) writes:
> Hello everyone!
>    I am quite interested in the behavior of the bubbles that floating
> on water's surface. I have several questions:
> 
> 1. What's the shape of it? Is it a perfect semi-sphere?

  I think the shape depands the property of the liquid that the
bubble is in. Bubbles must be in different shape between in
water and oil.  And I gauss it depands on the air pressure, and the
inner force between moleculars of the water or oil. I am interest
in how to calculate the shape by considering these two effect. Is there
any one who know it or have any reference?

> 2. Why does it break? And what's the machanism of it's breaking?

   Evaporating is a good explanation. We can do some experiments about
measuring the life time of bubble in different air pressure to check the
explanation.  

> 3. I suppose there are some relation between a bubble's 'life' and 'size'.
>    I think of an experiment like this:
[delete]
>    When a bubble appears on the surface, mesure its diameter immediately and
> start the time counting till it breaks. Has any one done such kind of
> experiment? What's it look like?

  What is the relation between size and life time??
  This is a interesting question.    
  
> 
> 4. What if the bubbles are floating in the air? If there is no gravitation,
> will them break?
> 

   If the bubble evaporate, it will break. I think.
   Another question, what is the behave if the bubbles is in water
   or oil but no gravitation ??  What is the vibration mode of the surface?
   If the temperture and pressure is nearly the criticl point of
   water, what are the bubbles going on ??

>    I hope you are also interested in these questions...
yes!! maybe we can do some expriment to explore the fact!! :)
> 
> Dragon
> clwu@Uz.nthu.edu.tw
>                                                                

Kim C.S. Chin
cschin@uz.nthu.edu.tw
================================================
Feynman say "Physics is for FUN", That's right.