Toothpaste is what is referred to as a non-newtonian fluid, more specifically toothpaste is a Bingham plastic. This way that the viscosity of the fluid is linearly dependency on the shear stress, however with one offset dubbed the yield stress (see figure below). This yield stress is what renders it hard to say whether it is fluid or solid. The fact that toothpaste is viscous alone is not adequate to define this, since water is likewise viscous, however doesn"t behave like a heavy (unless frozen, but that"s another phenomenon).
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What the yield stress does is the following. Listed below a details shear threshold the fluid responds together if it to be a solid, as you deserve to see happening when you have put toothpaste on your toothbrush, it just sits there without flow away. A highly viscous but newtonian liquid would flow away (although progressively as discussed by
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Now if you put sufficient shear tension on the toothpaste, as soon as you to express the tube of paste, the will start flowing and respond together a liquid.
Other examples, as discussed in the Wikipedia link in my very first sentence, space e.g. Mayonnaise and mustard. Another example is stunner putty.
Here"s a genchem-level answer because that a genchem-level question about the classification of matter:
Toothpaste is a sol: a stable suspension of small solid corpuscle in a liquid. Once the toothpaste dries the end you can see what the solid part alone watch like.
Mixtures with more than one phase regularly have amazing properties and behaviors that the components alone don"t have; the other answers come your inquiry touch on few of these.
Other instances of sols room paints and also solid-pigment inks. Again, you can see the solid component when lock dry.
Here"s the boring answer: Toothpaste is a mixture of part solids and also some liquids.
The inquiry "is it solid or liquid?" provides sense as soon as you"re talking about a problem or a mixture through a single phase—that is, a substance or mixture that"s nice much completely uniform transparent space. Instances of single-phase materials include pure water (a liquid), a chunk of copper (a solid), and sugar water (which is a liquid—including the sugar).
But some products consist of many phases, and also in this case, we have to ask the concern "is the solid or liquid?" individually for each phase. Instances of multiple-phase materials include ice water (a mixture include both a heavy (ice) and a fluid (water)), vinaigrette (a mixture the oil (a liquid) and vinegar (another liquid)), and also toothpaste (a mixture of number of kinds of solids and liquids).
It is Viscous.
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Viscous mean "having a thick, sticky consistency in between solid and liquid"(dictionary meaning)
There room many more examples favor tomato ketchup, honey, wax, toothpaste, etc.
To know an ext check out Wikipedia
Actually, toothpaste is both. I"m no chemist, but I am pretty certain that it have the right to be correctly classified together a semisolid, which method exactly what you"d think. Semisolids have properties that both solids and also liquids. Slime would be another example of a semisolid.
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