| Topic: |
Science > Physics |
| User: |
"arvee" |
| Date: |
23 Sep 2005 06:09:27 PM |
| Object: |
Sucking Spaghetti |
Sometimes when I eat spaghetti, and at the risk of grossing out my
dining partners, I will suck in a long strand. I find it a bit hard to
understand how the spaghetti "knows" it should go up into my mouth. Of
course, pressure differences must somehow be responsible, but AFAIK the
only relevant force would be that acting on the (very small) end of the
strand---besides which, the strand hangs limply, so would not seem to
be very effective at transmitting the force. The pressure acting on the
sides of the spaghetti as it hangs picturesquely from my mouth should,
effectively, integrate to zero.
No doubt someone has written a PhD thesis on this topic, but I don't
have a reference. Any hints?
Thanks
Ray Vickson
.
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| User: "Androcles Androcles@ MyPlace.org" |
|
| Title: Re: Sucking Spaghetti |
23 Sep 2005 06:25:18 PM |
|
|
"arvee" <C6L1V@shaw.ca> wrote in message
news:1127516967.306016.106140@o13g2000cwo.googlegroups.com...
| Sometimes when I eat spaghetti, and at the risk of grossing out my
| dining partners, I will suck in a long strand. I find it a bit hard to
| understand how the spaghetti "knows" it should go up into my mouth. Of
| course, pressure differences must somehow be responsible, but AFAIK
the
| only relevant force would be that acting on the (very small) end of
the
| strand---besides which, the strand hangs limply, so would not seem to
| be very effective at transmitting the force. The pressure acting on
the
| sides of the spaghetti as it hangs picturesquely from my mouth should,
| effectively, integrate to zero.
|
| No doubt someone has written a PhD thesis on this topic, but I don't
| have a reference. Any hints?
|
| Thanks
| Ray Vickson
No doubt someone has written a thesis on this topic but was laughed at
and not awarded a degree.
Androcles.
.
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|
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|
| User: "G=EMC^2 Glazier" |
|
| Title: Re: Sucking Spaghetti |
24 Sep 2005 02:15:24 PM |
|
|
Hi Ray true you make less pressure inside your mouth . It is like
whistling in reverse. You create friction with your lips and slurp the
soft pasta inward. Feynman proved when you bend dry spaghetti till it
breaks you end up not with two pieces but three. Lots of physics goes
into making pasta. Cooking pasta Eating pasta. How do they
make the tunnel running through? Beert
.
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|
| User: "stefjnoskynov" |
|
| Title: Re: Sucking Spaghetti |
24 Sep 2005 11:25:14 AM |
|
|
In article <1127516967.306016.106140@o13g2000cwo.googlegroups.com>,
C6L1V@shaw.ca says...
Sometimes when I eat spaghetti, and at the risk of grossing out my
dining partners, I will suck in a long strand.
Oh my god, I'm italian and I eat spaghetti very much, but I hope to
never eat with someone that suck spaghetti into the mouth!
I find it a bit hard to
understand how the spaghetti "knows" it should go up into my mouth. Of
Phereaps it would be understood with something about rational mechanics,
so studing the Hamiltonian of the sistem spaghetto. But why do you
thinks about physics when you eat spaghetti? Don't you like it very
much? If it is so simply don't eat spaghetti!
course, pressure differences must somehow be responsible, but AFAIK the
only relevant force would be that acting on the (very small) end of the
strand---besides which, the strand hangs limply, so would not seem to
be very effective at transmitting the force. The pressure acting on the
sides of the spaghetti as it hangs picturesquely from my mouth should,
effectively, integrate to zero.
No doubt someone has written a PhD thesis on this topic, but I don't
have a reference. Any hints?
eat hamburgers, please!
Thanks
Ray Vickson
.
|
|
|
| User: "Pronouns Anonymous" |
|
| Title: Re: Sucking Spaghetti |
24 Sep 2005 12:12:16 PM |
|
|
LOL! I must say that I've enjoyed reading this thread. Thanks for the
question, the physics, and the spaghetti commentary from an Italian
perspective.
I'm reminded of the Disney movie "Lady and the Tramp", in which the two
cartoon dogs suck the same strand of spaghetti and end in a kiss. I'm
sure that both the spaghetti and the kiss were so delightful that they
didn't think about the physics until later. And perhaps they can be
forgiven for having difficulty eating spaghetti with proper continental
manners since they don't have opposable thumbs.
Eating hamburgers messily is not nearly as much fun, although there
might be interesting physics questions regarding whether or not the
lettuce falls out while you're eating it. It probably depends on how
much catsup between the patty and the lettuce, how tightly you're
squeezing the bun, and the placement of your fingers.
The physics of eating rice with chopsticks is also interesting,
although perhaps there is a difference in cohesion depending on what
style of cooking (isn't Japanese-style rice somewhat clumpier than
Chinese-style rice?) Hopefully we can have some amusing e-mails about
people being shocked at Americans eating rice. (When no one is looking
I'd rather use a spoon.)
stefjnoskynov wrote:
In article <1127516967.306016.106140@o13g2000cwo.googlegroups.com>,
C6L1V@shaw.ca says...
Sometimes when I eat spaghetti, and at the risk of grossing out my
dining partners, I will suck in a long strand.
Oh my god, I'm italian and I eat spaghetti very much, but I hope to
never eat with someone that suck spaghetti into the mouth!
I find it a bit hard to
understand how the spaghetti "knows" it should go up into my mouth. Of
Phereaps it would be understood with something about rational mechanics,
so studing the Hamiltonian of the sistem spaghetto. But why do you
thinks about physics when you eat spaghetti? Don't you like it very
much? If it is so simply don't eat spaghetti!
course, pressure differences must somehow be responsible, but AFAIK the
only relevant force would be that acting on the (very small) end of the
strand---besides which, the strand hangs limply, so would not seem to
be very effective at transmitting the force. The pressure acting on the
sides of the spaghetti as it hangs picturesquely from my mouth should,
effectively, integrate to zero.
No doubt someone has written a PhD thesis on this topic, but I don't
have a reference. Any hints?
eat hamburgers, please!
Thanks
Ray Vickson
.
|
|
|
|
| User: "Josie Margolis" |
|
| Title: Re: Sucking Spaghetti |
24 Sep 2005 12:15:19 PM |
|
|
LOL! I must say that I've enjoyed reading this thread. Thanks for the
question, the physics, and the spaghetti commentary from an Italian
perspective.
I'm reminded of the Disney movie "Lady and the Tramp", in which the two
cartoon dogs suck the same strand of spaghetti and end in a kiss. I'm
sure that both the spaghetti and the kiss were so delightful that they
didn't think about the physics until later. And perhaps they can be
forgiven for having difficulty eating spaghetti with proper continental
manners since they don't have opposable thumbs.
Eating hamburgers messily is not nearly as much fun, although there
might be interesting physics questions regarding whether or not the
lettuce falls out while you're eating it. It probably depends on how
much catsup between the patty and the lettuce, how tightly you're
squeezing the bun, and the placement of your fingers.
The physics of eating rice with chopsticks is also interesting,
although perhaps there is a difference in cohesion depending on what
style of cooking (isn't Japanese-style rice somewhat clumpier than
Chinese-style rice?) Hopefully we can have some amusing e-mails about
people being shocked at Americans eating rice. (When no one is looking
I'd rather use a spoon.)
stefjnoskynov wrote:
In article <1127516967.306016.106140@o13g2000cwo.googlegroups.com>,
C6L1V@shaw.ca says...
Sometimes when I eat spaghetti, and at the risk of grossing out my
dining partners, I will suck in a long strand.
Oh my god, I'm italian and I eat spaghetti very much, but I hope to
never eat with someone that suck spaghetti into the mouth!
I find it a bit hard to
understand how the spaghetti "knows" it should go up into my mouth. Of
Phereaps it would be understood with something about rational mechanics,
so studing the Hamiltonian of the sistem spaghetto. But why do you
thinks about physics when you eat spaghetti? Don't you like it very
much? If it is so simply don't eat spaghetti!
course, pressure differences must somehow be responsible, but AFAIK the
only relevant force would be that acting on the (very small) end of the
strand---besides which, the strand hangs limply, so would not seem to
be very effective at transmitting the force. The pressure acting on the
sides of the spaghetti as it hangs picturesquely from my mouth should,
effectively, integrate to zero.
No doubt someone has written a PhD thesis on this topic, but I don't
have a reference. Any hints?
eat hamburgers, please!
Thanks
Ray Vickson
.
|
|
|
|
| User: "Josie Margolis" |
|
| Title: Re: Sucking Spaghetti |
24 Sep 2005 12:18:37 PM |
|
|
LOL! I must say that I've enjoyed reading this thread. Thanks for the
question, the physics, and the spaghetti commentary from an Italian
perspective.
I'm reminded of the Disney movie "Lady and the Tramp", in which the two
cartoon dogs suck the same strand of spaghetti and end in a kiss. I'm
sure that both the spaghetti and the kiss were so delightful that they
didn't think about the physics until later. And perhaps they can be
forgiven for having difficulty eating spaghetti with proper continental
manners since they don't have opposable thumbs.
Eating hamburgers messily is not nearly as much fun, although there
might be interesting physics questions regarding whether or not the
lettuce falls out while you're eating it. It probably depends on how
much catsup is between the patty and the lettuce, how tightly you're
squeezing the bun, and the placement of your fingers.
The physics of eating rice with chopsticks is also interesting,
although perhaps there is a difference in cohesion depending on what
style of cooking (isn't Japanese-style rice somewhat clumpier than
Chinese-style rice?) Hopefully we can have some amusing posts about
people being shocked at Americans eating rice. (When no one is looking
I'd rather use a spoon.)
stefjnoskynov wrote:
In article <1127516967.306016.106140@o13g2000cwo.googlegroups.com>,
C6L1V@shaw.ca says...
Sometimes when I eat spaghetti, and at the risk of grossing out my
dining partners, I will suck in a long strand.
Oh my god, I'm italian and I eat spaghetti very much, but I hope to
never eat with someone that suck spaghetti into the mouth!
I find it a bit hard to
understand how the spaghetti "knows" it should go up into my mouth. Of
Phereaps it would be understood with something about rational mechanics,
so studing the Hamiltonian of the sistem spaghetto. But why do you
thinks about physics when you eat spaghetti? Don't you like it very
much? If it is so simply don't eat spaghetti!
course, pressure differences must somehow be responsible, but AFAIK the
only relevant force would be that acting on the (very small) end of the
strand---besides which, the strand hangs limply, so would not seem to
be very effective at transmitting the force. The pressure acting on the
sides of the spaghetti as it hangs picturesquely from my mouth should,
effectively, integrate to zero.
No doubt someone has written a PhD thesis on this topic, but I don't
have a reference. Any hints?
eat hamburgers, please!
Thanks
Ray Vickson
.
|
|
|
|
|
| User: "" |
|
| Title: Re: Sucking Spaghetti |
23 Sep 2005 06:15:13 PM |
|
|
arvee <C6L1V@shaw.ca> wrote:
Sometimes when I eat spaghetti, and at the risk of grossing out my
dining partners, I will suck in a long strand. I find it a bit hard to
understand how the spaghetti "knows" it should go up into my mouth. Of
course, pressure differences must somehow be responsible, but AFAIK the
only relevant force would be that acting on the (very small) end of the
strand---besides which, the strand hangs limply, so would not seem to
be very effective at transmitting the force. The pressure acting on the
sides of the spaghetti as it hangs picturesquely from my mouth should,
effectively, integrate to zero.
No doubt someone has written a PhD thesis on this topic, but I don't
have a reference. Any hints?
Thanks
Ray Vickson
Hint: Ever try to push a rope?
--
Jim Pennino
Remove .spam.sux to reply.
.
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|
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|
| User: "Uncle Al" |
|
| Title: Re: Sucking Spaghetti |
24 Sep 2005 12:09:55 PM |
|
|
arvee wrote:
Sometimes when I eat spaghetti, and at the risk of grossing out my
dining partners, I will suck in a long strand. I find it a bit hard to
understand how the spaghetti "knows" it should go up into my mouth.
Pressure differential, contact lubricity, and material complaince.
Works for other things in other places, too, like sucking liquid
through a straw.
Of
course, pressure differences must somehow be responsible, but AFAIK the
only relevant force would be that acting on the (very small) end of the
strand---besides which, the strand hangs limply, so would not seem to
be very effective at transmitting the force.
Cross-sectional area, pressure gradient, opposing weight. Orifice
interface lubricity.
The pressure acting on the
sides of the spaghetti as it hangs picturesquely from my mouth should,
effectively, integrate to zero.
Yes.
No doubt someone has written a PhD thesis on this topic, but I don't
have a reference. Any hints?
As above.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
.
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|
| User: "Sam Wormley" |
|
| Title: Re: Sucking Spaghetti |
23 Sep 2005 07:12:10 PM |
|
|
arvee wrote:
Sometimes when I eat spaghetti, and at the risk of grossing out my
dining partners, I will suck in a long strand. I find it a bit hard to
understand how the spaghetti "knows" it should go up into my mouth.
According to Aristotle, everything tends to seek its
rightful place, but in this case it is atmospheric
pressure that provides the "force". Low friction helps!
Of course, pressure differences must somehow be responsible, but AFAIK the
only relevant force would be that acting on the (very small) end of the
strand---besides which, the strand hangs limply, so would not seem to
be very effective at transmitting the force. The pressure acting on the
sides of the spaghetti as it hangs picturesquely from my mouth should,
effectively, integrate to zero.
No doubt someone has written a PhD thesis on this topic, but I don't
have a reference. Any hints?
Thanks
Ray Vickson
.
|
|
|
|
| User: "Mark Martin" |
|
| Title: Re: Sucking Spaghetti |
23 Sep 2005 11:08:51 PM |
|
|
arvee wrote:
Sometimes when I eat spaghetti, and at the risk of grossing out my
dining partners, I will suck in a long strand. I find it a bit hard to
understand how the spaghetti "knows" it should go up into my mouth. Of
course, pressure differences must somehow be responsible, but AFAIK the
only relevant force would be that acting on the (very small) end of the
strand---besides which, the strand hangs limply, so would not seem to
be very effective at transmitting the force. The pressure acting on the
sides of the spaghetti as it hangs picturesquely from my mouth should,
effectively, integrate to zero.
No doubt someone has written a PhD thesis on this topic, but I don't
have a reference. Any hints?
Let's say that you've a noodly appendage dangling from your mouth,
your lips tightly wrapped about it. You command your diaphram to do a
"breath in" action, and the noodle slips into your mouth.
I'd say that the liquid which lubricates the noodle is itself being
pressed upon from outside your mouth by the greater air pressure,
induced by the partial vacuum generated with your diaphram. The liquid
is flowing into your mouth, exerting drag on the noodle because it has
some viscosity, carrying it along. The spaghetti strand is of course
wet along its whole length, and so it replenishes the inflowing stream
of visco-lubricant.
-Mark Martin
.
|
|
|
| User: "Arc Askew" |
|
| Title: Re: Sucking Spaghetti |
24 Sep 2005 11:30:45 AM |
|
|
Whoa... I was about to post a solution, but after reading your reply -
your analysis is very well spoken... Smartly said...
Mark Martin wrote:
arvee wrote:
Sometimes when I eat spaghetti, and at the risk of grossing out my
dining partners, I will suck in a long strand. I find it a bit hard to
understand how the spaghetti "knows" it should go up into my mouth. Of
course, pressure differences must somehow be responsible, but AFAIK the
only relevant force would be that acting on the (very small) end of the
strand---besides which, the strand hangs limply, so would not seem to
be very effective at transmitting the force. The pressure acting on the
sides of the spaghetti as it hangs picturesquely from my mouth should,
effectively, integrate to zero.
No doubt someone has written a PhD thesis on this topic, but I don't
have a reference. Any hints?
Let's say that you've a noodly appendage dangling from your mouth,
your lips tightly wrapped about it. You command your diaphram to do a
"breath in" action, and the noodle slips into your mouth.
I'd say that the liquid which lubricates the noodle is itself being
pressed upon from outside your mouth by the greater air pressure,
induced by the partial vacuum generated with your diaphram. The liquid
is flowing into your mouth, exerting drag on the noodle because it has
some viscosity, carrying it along. The spaghetti strand is of course
wet along its whole length, and so it replenishes the inflowing stream
of visco-lubricant.
-Mark Martin
.
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