| Topic: |
Science > Physics |
| User: |
"yoga" |
| Date: |
04 Jan 2006 10:42:34 AM |
| Object: |
surface tension |
Hi
I am a XI th standard student.
Could any of you tell me why liquids tend to have minimum surface area
&
how is it related to surface tension
.
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| User: "Gregory L. Hansen" |
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| Title: Re: surface tension |
05 Jan 2006 09:36:36 AM |
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In article <1136392954.867843.45550@g47g2000cwa.googlegroups.com>,
yoga <yoganand_19@yahoo.co.in> wrote:
Hi
I am a XI th standard student.
Could any of you tell me why liquids tend to have minimum surface area
&
how is it related to surface tension
Play with a water balloon. Meditate on how the weight of the water
changes the shape, and how the shape relates to the gravitational
potential energy of the water and the elastic energy of the rubber.
--
"What are the possibilities of small but movable machines? They may or
may not be useful, but they surely would be fun to make."
-- Richard P. Feynman, 1959
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| User: "" |
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| Title: Re: surface tension |
06 Jan 2006 07:20:24 AM |
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In article <dpjee4$hnd$5@rainier.uits.indiana.edu>,
(Gregory L. Hansen) wrote:
In article <1136392954.867843.45550@g47g2000cwa.googlegroups.com>,
yoga <yoganand_19@yahoo.co.in> wrote:
Hi
I am a XI th standard student.
Could any of you tell me why liquids tend to have minimum surface area
&
how is it related to surface tension
Play with a water balloon. Meditate on how the weight of the water
changes the shape, and how the shape relates to the gravitational
potential energy of the water and the elastic energy of the rubber.
My merry-go-round is in Michigan ;-). If I spin the balloon on it,
I should get dumbbells? I don't know the geometric word for dumbbell.
hmmm...I'm failing my 3-D geometry visualization. I can't imagine
what shapes I would get if I didn't center the balloon on the
merry-go-round. Ratzafratz..I need a y-gene.
/BAH
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| User: "dedanoe" |
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| Title: Re: surface tension |
04 Jan 2006 11:21:54 AM |
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the minimum surface area correspondns to maximum inner equilibrium.
that is how it is even with non-liquid bodies. just imagine the whole
as a system of numerous weights with one common equilibrium point.
don't pay attention to newton's third law it is not acurate -- the
bodies must suffer volumetric compression in order to amortize the
outer forces distorting them.
http://dedanoe.tripod.com
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| User: "PD" |
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| Title: Re: surface tension |
04 Jan 2006 12:09:22 PM |
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yoga wrote:
Hi
I am a XI th standard student.
Could any of you tell me why liquids tend to have minimum surface area
&
how is it related to surface tension
Anything that is under tension will take the shortest path possible
consistent with that tension. Take a piece of rubber balloon and
stretch it over a wire frame. This should be intuitive.
PD
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| User: "Andy Resnick" |
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| Title: Re: surface tension |
05 Jan 2006 08:17:24 AM |
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yoga wrote:
Hi
I am a XI th standard student.
Could any of you tell me why liquids tend to have minimum surface area
&
how is it related to surface tension
If the interfacial energy is positive (it is for most things), it costs
energy to create an interface. If the interfacial energy is negative
(one way to think of miscible fluids), it costs energy to make the
interfacial area smaller.
Keeping with the universal law that all things are lazy and seek to
minimize energy expenditures, immiscible fluids will spontaneously form
minimal surfaces, while miscible fluids will spontaneously mix.
--
Andrew Resnick, Ph.D.
Department of Physiology and Biophysics
Case Western Reserve University
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