The Naked Scientists

The Naked Scientists Forum

Author Topic: Why Aren't These Big Bubbles Round ?  (Read 3849 times)

Offline neilep

  • Withdrawnmist
  • Naked Science Forum GOD!
  • *******
  • Posts: 20602
  • Thanked: 8 times
    • View Profile
Why Aren't These Big Bubbles Round ?
« on: 27/09/2010 16:07:05 »
Dearest Bubble-ologists,

As a sheepy I of course luff bubbles !..Bubbles are my all time favourite soapy shiny roundy floaty things that are bubble shaped !

Look, here's Bayleaf the cat enjoying bubble luff !


Bayleaf Enjoying Bubbles

...but take a look at the vid here...see these amazing bubbles ?

nice eh ?...being delivered next Tuesday


But i want them round......not squiggly wiggly shape !!

..why are not these big bubbles round ?.....I rang up the vet to find out and they did not know and told me to not ring them again so I then printed my question and stuck it on a cow but no answer was  forthcoming !...........sheesh !


Can ewe tell me why these big bubbles are not round  ?


thanks

hugs and shmishes


mwah mwah mwah



Neil
I Luff Bubbles In The Bath !
xxxxxxxxxxxxxxxxxxxxxxxxxxx





« Last Edit: 27/09/2010 16:10:27 by neilep »


 

Offline imatfaal

  • Neilep Level Member
  • ******
  • Posts: 2787
  • rouge moderator
    • View Profile
Why Aren't These Big Bubbles Round ?
« Reply #1 on: 27/09/2010 16:31:36 »
Brilliant Vid! 


As a follow-up question - at what speed does the bubble die.  ie Quite a few of the long bubbles you can see the line of destruction propagating along the bubble - what do the nsf-ers think would influence the speed of propagation? 
 

Offline RD

  • Neilep Level Member
  • ******
  • Posts: 8132
  • Thanked: 53 times
    • View Profile
Why Aren't These Big Bubbles Round ?
« Reply #2 on: 27/09/2010 17:09:39 »
...but take a look at the vid here

My (admittedly paranoid) anti-virus puts a big red cross on that video site... http://www.siteadvisor.com/sites/videobash.com
« Last Edit: 27/09/2010 17:20:09 by RD »
 

Offline neilep

  • Withdrawnmist
  • Naked Science Forum GOD!
  • *******
  • Posts: 20602
  • Thanked: 8 times
    • View Profile
Why Aren't These Big Bubbles Round ?
« Reply #3 on: 27/09/2010 18:18:19 »
Brilliant Vid! 


As a follow-up question - at what speed does the bubble die ?  ie Quite a few of the long bubbles you can see the line of destruction propagating along the bubble - what do the nsf-ers think would influence the speed of propagation? 

Excellent follow up questions imatfaal....I hope we get answers to all !
 

Offline neilep

  • Withdrawnmist
  • Naked Science Forum GOD!
  • *******
  • Posts: 20602
  • Thanked: 8 times
    • View Profile
Why Aren't These Big Bubbles Round ?
« Reply #4 on: 27/09/2010 18:20:30 »
...but take a look at the vid here

My (admittedly paranoid) anti-virus puts a big red cross on that video site... http://www.siteadvisor.com/sites/videobash.com

Gosh RD...I've been watching vids on there for a while and my pc seems fine...pzzzztttt kappooof BANG !!

isn't McAfee a bit...over zealous ?
 

Offline tommya300

  • Hero Member
  • *****
  • Posts: 655
    • View Profile
Why Aren't These Big Bubbles Round ?
« Reply #5 on: 27/09/2010 18:21:21 »
Brilliant Vid! 

As a follow-up question - at what speed does the bubble die.  ie Quite a few of the long bubbles you can see the line of destruction propagating along the bubble - what do the nsf-ers think would influence the speed of propagation? 
At what speed? As soon as possible.
Surface tention of the bubble, viscocity, temperature, humidity, external air currents and the number of cats existing in the bubbletorium.

or



or dont break my bubble

« Last Edit: 27/09/2010 19:04:58 by tommya300 »
 


Offline Geezer

  • Neilep Level Member
  • ******
  • Posts: 8328
  • "Vive la résistance!"
    • View Profile
Why Aren't These Big Bubbles Round ?
« Reply #7 on: 28/09/2010 05:08:37 »
Isn't that Chimp Eastwood?
 

Offline RD

  • Neilep Level Member
  • ******
  • Posts: 8132
  • Thanked: 53 times
    • View Profile
Why Aren't These Big Bubbles Round ?
« Reply #8 on: 28/09/2010 06:19:49 »
 

Offline RD

  • Neilep Level Member
  • ******
  • Posts: 8132
  • Thanked: 53 times
    • View Profile
Why Aren't These Big Bubbles Round ?
« Reply #9 on: 28/09/2010 06:34:19 »
... at what speed does the bubble die. 

Apparently at a similar speed to the BB thrown to burst it ...
 
feature=related  @ 3:40
« Last Edit: 28/09/2010 06:43:50 by RD »
 

Offline tommya300

  • Hero Member
  • *****
  • Posts: 655
    • View Profile
Why Aren't These Big Bubbles Round ?
« Reply #10 on: 28/09/2010 07:46:30 »
... at what speed does the bubble die. 

Apparently at a similar speed to the BB thrown to burst it ...
 
feature=related  @ 3:40

That was outstanding
 

Offline neilep

  • Withdrawnmist
  • Naked Science Forum GOD!
  • *******
  • Posts: 20602
  • Thanked: 8 times
    • View Profile
Why Aren't These Big Bubbles Round ?
« Reply #11 on: 28/09/2010 11:07:39 »
... at what speed does the bubble die. 

Apparently at a similar speed to the BB thrown to burst it ...
 
feature=related  @ 3:40

At circa 1.50 bubbles WANT to be round !...why ?
 

Offline peppercorn

  • Neilep Level Member
  • ******
  • Posts: 1466
    • View Profile
    • solar
Why Aren't These Big Bubbles Round ?
« Reply #12 on: 28/09/2010 11:18:42 »
At circa 1.50 bubbles WANT to be round !...why ?
Bubbles 'want' to be spherical because it represents the lowest energy state for each soap molecule over the bubbles entire surface...   or something!  :-X
 

Offline daveshorts

  • Moderator
  • Neilep Level Member
  • *****
  • Posts: 2583
  • Physics, Experiments
    • View Profile
    • http://www.chaosscience.org.uk
Why Aren't These Big Bubbles Round ?
« Reply #13 on: 28/09/2010 13:36:52 »
Surface tension attempts to minimise the surface area of the bubble, the shape with the minimum surface area is a sphere.

Surface tension has a constant strength no matter what size the bubble is, so the larger the bubble is the less important it is compared to effects like turbulence, so the bigger the bubble the less spherical it will be especially if there is a bit of wind.
 

The Naked Scientists Forum

Why Aren't These Big Bubbles Round ?
« Reply #13 on: 28/09/2010 13:36:52 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums