| Topic: |
Science > Physics |
| User: |
"Sam Wormley" |
| Date: |
01 Sep 2005 11:28:43 PM |
| Object: |
The physics of [breaking] pasta |
The physics of pasta (Sep 1)
http://physicsweb.org/article/news/9/9/1
Why does dry spaghetti always break into several pieces -- and not just
two pieces -- when snapped? This perplexing question has now been
answered by two physicists at the University of Paris 6 in France, who
say that elastic waves traveling along the pasta cause it to fragment.
The result has applications in materials and civil engineering (Phys.
Rev. Lett. 95 095505).
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| User: "Autymn D. C." |
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| Title: Re: The physics of [breaking] pasta |
02 Sep 2005 02:49:13 AM |
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I saw no movie.
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| User: "tj Frazir" |
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| Title: Re: The physics of [breaking] pasta |
04 Sep 2005 09:54:23 AM |
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Momentum causes the breaks.
Torsion and momentum .
Swing a long 1/2 rotted stick and stop its swing from one end and see it
it just snaps off in your hand.
speghette is like a frozen hose.
R of the snap is the least V and the V is much more at boath ends wile
stopping them quick again breaks it again.
BUSTED
Launch the bust and dont stop the ends and it WILL bust in two evry
time.
THIS test proved them wrong.
I let them fly to the deck ,,bending till they snap and not holding
them .
DO it,,it proves these clowns wrong.
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| User: "Jan Panteltje" |
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| Title: Re: The physics of [breaking] pasta |
02 Sep 2005 06:18:33 AM |
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On a sunny day (Fri, 02 Sep 2005 04:28:43 GMT) it happened Sam Wormley
<swormley1@mchsi.com> wrote in <%xQRe.304422$_o.250815@attbi_s71>:
The physics of pasta (Sep 1)
http://physicsweb.org/article/news/9/9/1
Why does dry spaghetti always break into several pieces -- and not just
two pieces -- when snapped? This perplexing question has now been
answered by two physicists at the University of Paris 6 in France, who
say that elastic waves traveling along the pasta cause it to fragment.
The result has applications in materials and civil engineering (Phys.
Rev. Lett. 95 095505).
Completely idiotic, I knew that the first time I broke a spaghetty string.
Next we will have a paper on why marbles roll.
You can actually SEE that happening to the spaghetti.
perplexing question my foot.
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| User: "Sam Wormley" |
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| Title: Re: The physics of [breaking] pasta |
04 Sep 2005 07:53:52 AM |
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Jan Panteltje wrote:
On a sunny day (Fri, 02 Sep 2005 04:28:43 GMT) it happened Sam Wormley
<swormley1@mchsi.com> wrote in <%xQRe.304422$_o.250815@attbi_s71>:
The physics of pasta (Sep 1)
http://physicsweb.org/article/news/9/9/1
Why does dry spaghetti always break into several pieces -- and not just
two pieces -- when snapped? This perplexing question has now been
answered by two physicists at the University of Paris 6 in France, who
say that elastic waves traveling along the pasta cause it to fragment.
The result has applications in materials and civil engineering (Phys.
Rev. Lett. 95 095505).
Completely idiotic, I knew that the first time I broke a spaghetty string.
Next we will have a paper on why marbles roll.
You can actually SEE that happening to the spaghetti.
perplexing question my foot.
Now Jan... you can see it happening, but you couldn't explain why.
Here you go: http://teacher.pas.rochester.edu/phy121/LectureNotes/Chapter12/Chapter12.html
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| User: "Jan Panteltje" |
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| Title: Re: The physics of [breaking] pasta |
04 Sep 2005 08:44:31 AM |
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On a sunny day (Sun, 04 Sep 2005 12:53:52 GMT) it happened Sam Wormley
<swormley1@mchsi.com> wrote in <A7CSe.307690$x96.188460@attbi_s72>:
Jan Panteltje wrote:
On a sunny day (Fri, 02 Sep 2005 04:28:43 GMT) it happened Sam Wormley
<swormley1@mchsi.com> wrote in <%xQRe.304422$_o.250815@attbi_s71>:
The physics of pasta (Sep 1)
http://physicsweb.org/article/news/9/9/1
Why does dry spaghetti always break into several pieces -- and not just
two pieces -- when snapped? This perplexing question has now been
answered by two physicists at the University of Paris 6 in France, who
say that elastic waves traveling along the pasta cause it to fragment.
The result has applications in materials and civil engineering (Phys.
Rev. Lett. 95 095505).
Completely idiotic, I knew that the first time I broke a spaghetty string.
Next we will have a paper on why marbles roll.
You can actually SEE that happening to the spaghetti.
perplexing question my foot.
Now Jan... you can see it happening, but you couldn't explain why.
You are not serious what?
You can SEE the wave motion!
Have you ever made spaghetti?
I am expert at this :-)
You completely underestimate normal human brain evaluation.
You completely overestimate the mathematical scribbling that beaks not
even a straw.
Let's call it the 'Baez syndrome'.
In my view it works like this (spaghetti related).
As we grow and learn from playing with the world around us from the age of
a little baby till now (hopefully0 we build neuron patterns in out head that
are VERY GOOD in predicting the outcome of effects of forces on matter etc.
Ask Tiger Woods for the math to hit the ball just that way.
His eyes see (the slightest detail), his model is correct, he wins.
When you break the spaghetti you can SEE the wave move and do its work.
If you did not (see that), break some more and watch.
It is cheap, you can try a lot of times for one packet or plate full.
Come to think of it maybe I will have spaghetti tonight, maybe not.
But YOU should.
So, anyways, the neural net model (we build when learning when we grow up)
is in many cases BETTER at prediction with great precision and UNDERSTANDING
then the sub system (sub set of neurons) in that same neural net called
(representing the art of) math.
I hope you can see that.
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| User: "Bruce Scott TOK" |
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| Title: Re: The physics of [breaking] pasta |
05 Sep 2005 09:14:01 AM |
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Responses of my Italian colleagues to this:
1. Indeed, breaking up spaghetti meant a night in prison in the good old
kingdom of Naples. Moreover, I am only interested in the phase in
which the tension is small but finite (pasta "al dente")
2. I never thought about that but I will try to give my contribute to
the related experimental campaign already tonight at dinner
time... (change topic to Bayern against Juventus)
3. I think it's an intriguing puzzle - why uncooked spaghetti always
break into several pieces - that these french scientists may have
actually resolved. But I don't think this will lead into better
spaghetti... In any case, one should never snap spaghetti. I agree
with (#1) on this!
:-)))
--
ciao,
Bruce
drift wave turbulence: http://www.rzg.mpg.de/~bds/
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| User: "tj Frazir" |
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| Title: Re: The physics of [breaking] pasta |
04 Sep 2005 10:06:27 AM |
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The reality is chilling.
The fact that these idiots toulk high speed images.
Had it been a mistery ,,engineers would not have a word for it.
Physics uses the same word.
STANDING WAVE
is the wood the french could not learn.
newton even noticed !
How drick thick could any one in physics be ?
DOES ayone even see the word Standing_Wave ???
Standing waves cross the same point and momentum is in two directions
shear .
But the french wrote it and sam read it !!
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| User: "tj Frazir" |
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| Title: Re: The physics of [breaking] pasta |
04 Sep 2005 10:34:23 AM |
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They call them elastic waves ..HA HA .
what a bunch of idiots.
The pasta is eleastic ,,the wave is a STANDING WAVE ad the posta past
its torsion point.
I cant find the word STANDING WAVE=8F=95R=95T*M
over torsion psi anywhere in thier paper.
I dont think they know a standing wave .
That means they dont know enouph physics.
1 ,,the idiots wrote ELASTIC waves ,,
2 ,, standing waves are not eleastic Only the conductor can be elastic.
The conductor and the wave are not the same thing.
3 , Why invent a new word for Stading-wave ?
4 ,, knowing what wave lenth I will make,,I will draw a line at evry
point it will break .
HAD the french kids gone to class ,,they could have skipped te taking
pics with high speed film . They could have sat in class and learned a
new word ,,class ,,can you say Standing-wave ?
repeat it after me ,,standing _wave
makes the plywood jump when you hit it.
makes the glass bumb so water flys put.
slaps your teeth together when the boot hits yer but.
YUP standing waves have a direction.
compression waves dont.
Thats why you can talk in a tube in the engine room and I can hear you
..
The standing wave has direction and the compresion wave dont.
So ya gota use da OTHER math stuff .
What will a compresion wave do to it ?? HUMM ?
compresin wave can turn back on its self.
th compresion wave cant excead its own void of pull back. 1000 psi
going forward cant leave a psi vacume behind it. or the psi will just
change directions and go back on its self.
The sound is converted to a compresion wave in the tube and back to
compresion wave out side the tube .
Put the hose side up to your ear as some one talks threw the hose.
Now ear up the end of the hose.
When the air compresion wave came out the end of the hose it expanded
and was converted to sound. It was not a sound inside the hose ( less
the loss in the hose was converted )
So at some point I wount hear you.
is due two looses..1 the loss in te hose side and 2 the loss of
compresion wave going back on its self going forward.
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