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Manta173

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Jan 30, 2008
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Lukeje said:
Manta173 said:
Thats actually the most applicable to glass you can get except for specialists. Polymer physicists know more about this than anyone else, but again... what is that second word...physics.... hmmmm... And if you really look into it.... phase transitions are thermodynamic properties... thermo is a physics topic. (although chemists try to figure it out with varying levels of success...)
I'd like to point out that Thermodynamics is just maths with a little bit of physical intuition; anyone with a grasp of differential equations can derive it (if you mean stat thermo, then that's a completely different kettle of fish, but is still well understood by Chemists at least as well as by physicists).
Whilst physicists may claim to know everything (or at least have theories), it is Chemists that deal with real world problems. Unfortunately, the movement of glass does not happen on any sort of time scale chemists deal with; I have to say the best people to ask would probably be geologists with the sort of timescales that are required(!)
Oh, and to the poster who said that 'Solids have a regular ordered structure', that's the definition of a crystal not a solid, solids may be amorphous.
I knew if I tried I could find a chemist to piss off.... lol GO CHEM E's!!!
 

KefZ_X

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Nov 14, 2007
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Ok my turn

-Coca-Cola would be green if colouring weren?t added to it.
-Earth is the only planet not named after a god.
-King Henry VIII slept with a gigantic axe.
-In 1843, a Parisian street mime got stuck in his imaginary box and consequently died of starvation.
-Moths are unable to fly during an earthquake.
-"Hello Kitty" began as part of a covert propaganda campaign originally proposed by Prime Minister Tojo during World War II.

and my favourite

Charlie Chaplin once won third prize in a Charlie Chaplin look-alike contest.
 

Calobi

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Dec 29, 2007
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The_woods_man said:
LOOY said:
It was physically posible for Dodo's to have flown, but they seemed to not realise this...
I'm pretty sure this is true about the bumble bee (the big fluffy ones), and so that is my contribution.
Technically, bumble bees can fly. A lot of people believe they can't because their muscles (or what they use in place of them) shouldn't have enough strength to lift them. However, when put through tests by scientists/biologists it was found that they create small eddies in the air which help them stay afloat via pressure differences.

Also, this is 100 post. Hooray me!
 

stubbmann

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Jan 25, 2008
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Manta173 said:
Abolished said:
-Moths are unable to fly during an earthquake.
Yeah I'll call BS on that one.
So you're calling BS on that one, and not the one about the mime getting stuck in his imaginary box?

Anyway, Anne Boleyn (second wife of henry the eighth) had three breasts and six fingers on her left hand (or did she?)
 

DjDemonAsh

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Apr 2, 2008
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The whole glass is a solid/liquid thing.
Right, first off, glass is made and has a film over it to stop it from completely disentegrating.
This film also acts as stability as its pressured and pulls the glass together.
Because of this, glass is kept in a rigid state.
Over hundreds of years, glass would infact move to be larger at the bottom CENTER than the corners. Glass is considered liquid by many scientists and the likes because it does not have a completely secure set of molecules as they can be very easily seperated.
 

cleverlymadeup

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Mar 7, 2008
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DjDemonAsh said:
Right, first off, glass is made and has a film over it to stop it from completely disentegrating.
This film also acts as stability as its pressured and pulls the glass together.
Because of this, glass is kept in a rigid state.
Over hundreds of years, glass would infact move to be larger at the bottom CENTER than the corners. Glass is considered liquid by many scientists and the likes because it does not have a completely secure set of molecules as they can be very easily seperated.
no that's false on a few accounts, including the scientist thing

quick google/wikipedia search proves that those claims are false

there is a treatment but it's so the glass either dries well and/or doesn't stick together
 

werepossum

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Sep 12, 2007
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Manta173 said:
I'm sorry but chemists are not experts on the states of matter by any definition. Physicists are.... and I happen to be well trained in both... chemical engineering bachelors and a masters in polymer science and one in polymer engineering.

Glass is a liquid.
Dude, if you have two masters in science and engineering and you still think glass is a liquid then you seriously need to get your money back. Solids as a rule become plastic before becoming liquid. Heat a bar of steel enough and it will bend under its own weight. Put a bar of steel under enough pressure and it will flow. Put enough shear or torsional or bending force on a steel bar and it will fail plastically before it fails completely. No piece of steel has a completely regular, crystalline structure; there are always imperfections and discontinuities. Obviously none of that makes steel a liquid. The case is much the same for glass.

The principle defining characteristic of a liquid as opposed to a solid (of either type) is that the molecules are not fixed in place strongly enough to deform elastically. Depending upon your classification proclivities (lumper versus splitter), glass is either a basic and common state of matter - an amorphous or vitreous solid with molecules fixed in a random pattern, as some have mentioned - or it is a special case of solid, an amorphous (as opposed to a crystalline solid, molecules fixed in a regular pattern) solid. The main definition of a solid is that is reacts to an application of force with elastic deformation; that is, even the most fragile solid has some amount of deforming elastically, meaning that it returns to its original structure after the force is removed. A liquid does not; it may return to its original shape after the force is removed, but the molecules in a given location are not the same molecules that were in that location before the deformation. Glass is a pure solid in that it either deforms elastically or it fails; it does not act like a liquid. If you apply a force to a piece of glass and then remove it, it either regains its original shape WITH THE SAME MOLECULAR STRUCTURE, or it remains deformed. If you apply a force to a liquid and then remove it, the liquid regains its original shape WITH DIFFERENT MOLECULAR STRUCTURE. The same molecules are present, but they are now in different locations and relationships. I don't know how to state that in a simpler fashion.

Considering glasses as liquid deprives "liquid" of any meaning. You might just as well consider crystalline solids as liquids, too, since sufficient force causes deformation and flow. And of course gases are nothing but energetic liquids. And plasmas are nothing more than energetic liquids with unusual atomic structure. Either of those cases makes just as much sense as considering glasses as liquid.

Here's a good reference on the pluses and minuses of the classification of glass. Read it.
http://dwb.unl.edu/Teacher/NSF/C01/C01Links/www.ualberta.ca/~bderksen/florin.html
 

Rabid Toilet

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Mar 23, 2008
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Glass has properties of both solids and liquids, and is thus essentially undefined.

Shut up already.
 

cleverlymadeup

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Mar 7, 2008
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x434343 said:
If Half-Life became a movie, Hugh Laurie would be a perfect Gordon Freeman. :D
when Hugh auditioned for the role of house, Bryan Singer said Hugh was a great example of a good american actor, not knowing Hugh was british and was faking the accent
 

call me alo

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May 8, 2008
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In India it against the law to commit sodomy, any other gay sexual act and to be a transvestite. Yet transvestites are thought to hold the power to curse you so no one goes after them. They cant legally get jobs either but thats ok because its thought of as good look to have sum at your wedding, if you dont please them money wise there, they can cure your marriage even your first born.
 

BuckminsterF

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Mar 5, 2008
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Hitler is a least partially responsable for the hippie van, George Orwell was a Socialist, and Tesla disliked Edison

EDIT: you can't play the saxophone or polo left-handedly
 

the monopoly guy

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May 8, 2008
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you can never actaully touch anything, at the molecular level there is always space between you and whatever your "touching"...perfect excuse if you're a pervert.
 

damo69697

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May 14, 2008
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in AD 404 a tragic event finally put an end to the gladiators. A Christian monk named Telemachus entered the arena in Rome and tried to separate two combatants. The crowd went berserk, climbed over the walls into the arena and tore the monk limb from limb. The Emperor Honorius permanently banned all gladiator contests. random enough
 

Anarchemitis

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Dec 23, 2007
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One of the best modern theories of Faster-than-light travel involves making the space-constant ('C', aka the speed of light, 300,000km/s) faster so that the limit of speed allows faster than normal light.
 

Unknown_Exile

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Feb 3, 2008
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What we call the sky is merely the limit of our vision into the atmosphere. The sky, like the horizon, is always as far away as one can see.

You share your birthday with at least nine million other people around the world.

The world's first speed limit regulation was in England in 1903. It was 20 mph.

Napoleon Bonaparte is the historical figure most often portrayed in movies. He has been featured in 194 movies, Jesus Christ in 152, and Abraham Lincoln in 137.

The Eiffel Tower receives a fresh coat of 300 tons of reddish-green paint every seven years.

In M&M candies, the letters stand for Mars and Murrie, the developers of the candy in 1941.

The first safety feature for an automobile was invented in 1908 by John O'Leary. He patented a large net, to be installed on the front fender, to scoop pedestrians out of the way before they could be run over.

The original name of Los Angeles was El Pueblo de Nuestra Senora la Reina de los Angeles del rio Porciuncula, translating into:The Village of our Lady the Queen of the Angels of the Porciuncula River.

In 1945 a computer at Harvard malfunctioned and Grace Hopper, who was working on the computer, investigated, found a moth in one of the circuits and removed it. Ever since, when something goes wrong with a computer, it is said to have a bug in it.

The term "devil's advocate" comes from the Roman Catholic Church. When deciding if someone should be sainted, a devil's advocate is always appointed to give an alternative view.

Theodore Roosevelt was the only U.S. president to deliver an inaugural address without using the word "I". Abraham Lincoln, Franklin D. Roosevelt and Dwight D. Eisenhower tied for second place, using "I" only once in their inaugural addresses.

On average, right-handed people live 9 years longer than their left-handed counterparts.

On average, people fear spiders more than they do dying. However, statistically you are more likely to be killed by a champagne cork than by the bite of a poisonous spider.