EPTThus the question is not really if it's better to know or not to know, but more likely if it's better to live healthily and longer, or junkily and shorter
Ask and answer stupid questions here! - Page 555
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OtherWorld
France17333 Posts
Thus the question is not really if it's better to know or not to know, but more likely if it's better to live healthily and longer, or junkily and shorter | ||
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GreenHorizons
United States23957 Posts
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JimmiC
Canada22817 Posts
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FiWiFaKi
Canada9859 Posts
Does it undergo a phase change? | ||
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ZigguratOfUr
Iraq16955 Posts
On December 24 2016 07:37 FiWiFaKi wrote: Is toothpaste a liquid or solid? Does it undergo a phase change? If the TSA is asking the question it's a liquid. If a chemist is asking the question it's a colloidal gel. | ||
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imp42
398 Posts
On December 24 2016 07:37 FiWiFaKi wrote: Is toothpaste a liquid or solid? Does it undergo a phase change? It's obviously a liquid. proof: 1) at the airports you're not allowed to bring more than 100ml of liquids with you per container. 2) if you have more than 100ml of toothpaste they will take it away. q.e.d. | ||
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ZigguratOfUr
Iraq16955 Posts
On December 24 2016 12:15 imp42 wrote: It's obviously a liquid. proof: 1) at the airports you're not allowed to bring more than 100ml of liquids with you per container. 2) if you have more than 100ml of toothpaste they will take it away. q.e.d. That's a formal fallacy. 1. At airports you're not allowed to bring more than 100ml of liquids with you 2. If you bring an assault rifle to the airport they will take it away Therefore assault rifles are a liquid. Q.E.D | ||
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FiWiFaKi
Canada9859 Posts
The way I would define a liquid is: As a shear stress approaching zero is applied on a substance, it will deform until the stress is removed. Since if you don't define it that way, then every non-crystalline solid is a liquid, because they all shear and have viscosity eventually (Bingham plastic). | ||
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Thieving Magpie
United States6752 Posts
On December 24 2016 12:38 ZigguratOfUr wrote: That's a formal fallacy. 1. At airports you're not allowed to bring more than 100ml of liquids with you 2. If you bring an assault rifle to the airport they will take it away Therefore assault rifles are a liquid. Q.E.D Liquid_AssaultRifle | ||
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Cascade
Australia5405 Posts
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. Which would make it a liquid. It is a pretty viscous liquid, but a liquid no doubt. You can't assign a shape to toothpaste, but it has a mostly constant volume. So airports are in agreement with wiki on that. That also fits with what they told us in undergrad physics iirc, but that'd be th eleast reliable information of the formal definition of liquid.  Regarding phase change, there are several ingredients in tooth paste, which have different melting and boiling points, so heating it up or cooling it down would probably make the toothpaste seperate the ingredients as they boil/freeze. If anyone wants more details, it seems like the main ingredient in toothpaste (apart from water) is hydrated silica, so exploring how that reacts to heat/cold would be a starting point. | ||
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Uldridge
Belgium5161 Posts
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Acrofales
Spain18292 Posts
On December 24 2016 21:02 Uldridge wrote: Either you wanted to type can instead of can't and you messed up, or you messed up, because toothpaste is definitely form-assignable. Also I personally haven't tried to compress tooth paste to see how it retains its volume so I wouldn't be able to tell. Anyone want to be the initiator on that? Maybe we can get one of those cheesy Youtube challenges out of it: The "press your toothpaste tube" challenge. Sounds oddly sexual for something that should plat all over one's face, oh nevermind.. Regarding the compression, are you trying to argue it's a gas?! As for form, pretty sure that if you leave a pile of toothpaste out of its tube it will slowly spread out. You can't make little shapes and have them stay that way (unless you dry it out while shaping it). Sounds pretty liquid to me! | ||
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Simberto
Germany11839 Posts
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imp42
398 Posts
On December 24 2016 21:23 Simberto wrote: I'd guess that toothpaste is a combination of liquids and solids, like mud for example. Toothpaste behaves kind of like mud. That is totally inaccurate. Because toothpaste makes your teeth clean while mud makes your teeth dirty. | ||
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Uldridge
Belgium5161 Posts
On December 24 2016 21:16 Acrofales wrote: Regarding the compression, are you trying to argue it's a gas?! As for form, pretty sure that if you leave a pile of toothpaste out of its tube it will slowly spread out. You can't make little shapes and have them stay that way (unless you dry it out while shaping it). Sounds pretty liquid to me! Maybe I am trying to argue it's a gas! No, you know what, I'm part of a new movement now, called the "Phasers" where it's shown, through anecdotal and other kinds of "evidence" that what physicists have been trying to pass as dogma, has been lies all along. There is no thing as a "liquid" Toothpaste is a GAS. Where is this so called liquid after you've brushed your teeth? It's all evaporated. The gas is stuck inside a barrier, which is broken open when grinded against a surface. The gas is supercooled and put inside this membrane, so it can't expand because of the small confinements. That's why tooth paste feels cool for a second when you start brushing your teeth! And then it all evaporates! Where are all the colours you saw in the beginning?!?! Liquids are a LIE, only solids and gases exist. WAKE UP PEOPLE!!!! | ||
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imp42
398 Posts
On December 24 2016 23:42 Uldridge wrote: Maybe I am trying to argue it's a gas! No, you know what, I'm part of a new movement now, called the "Phasers" where it's shown, through anecdotal and other kinds of "evidence" that what physicists have been trying to pass as dogma, has been lies all along. There is no thing as a "liquid" Toothpaste is a GAS. Where is this so called liquid after you've brushed your teeth? It's all evaporated. The gas is stuck inside a barrier, which is broken open when grinded against a surface. The gas is supercooled and put inside this membrane, so it can't expand because of the small confinements. That's why tooth paste feels cool for a second when you start brushing your teeth! And then it all evaporates! Where are all the colours you saw in the beginning?!?! Liquids are a LIE, only solids and gases exist. WAKE UP PEOPLE!!!! You might be on to something here. Did you know "toothpaste" is an anagram of "pathos TOTE"? TOTE is an acronym for "Tropical Ozone Transport Experiment" Ozone is a gas! I am also very intrigued by the "Experiment" part. | ||
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SoSexy
Italy3725 Posts
and she said 'I cant, I'm on antibiotics until March 12th' Am I safe to copulate with her? | ||
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Gamerhcp
734 Posts
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xM(Z
Romania5299 Posts
Fragile materials 1 ranging from sand to fire-retardant to toothpaste are able to exhibit both solid and fluid-like properties across the jamming transition. Unlike ordinary fusion, systems of grains, foams and colloids jam and cease to flow under conditions that still remain unknown. Here we quantify jamming via a thermodynamic approach by accounting for the structural aging and the shear-induced compressibility 2 of dry sand. Specifically, the jamming threshold is defined using a non-thermal temperature 3 that measures the ‘fluffiness’ of a granular mixture. The thermodynamic model, casted in terms of pressure, temperature and free-volume, also successfully predicts the entropic data of five molecular glasses. Notably, the predicted configurational entropy avoids the Kauzmann paradox 4 entirely. Without any free parameters, the proposed equation-of-state also governs the mechanism of shear-banding and the associated features of shear-softening and thickness-invariance 5 . or https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5024619/ it's basically all about jamming; if you jam really hard you transcend limits and bounds and such. | ||
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Acrofales
Spain18292 Posts
On December 25 2016 05:42 xM(Z wrote: you dudes need to read things like this A thermodynamic unification of jamming or https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5024619/ it's basically all about jamming; if you jam really hard you transcend limits and bounds and such. Bob Marley was talking about toothpaste all along! | ||
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