You can, even if you walk along the street or apartment. No matter what force acts on water, butter or milk, they will still retain their liquid state, whether it be stirring, pouring or other physical impact.

Another thing is non-Newtonian fluids. Their peculiarity lies in the fact that their fluid properties fluctuate depending on the speed of its current. A non-Newtonian fluid is easily made by mixing water with edible potato/corn starch.

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Ordinary liquids spread, overflow, and are easily permeable. But there are substances that can occupy vertical position and even support the weight of a person. They are called non-Newtonian fluids.

There are emulsions whose viscosity is variable and dependent on the strain rate. Many suspensions have been developed with properties that contradict the laws of hydraulics. Their use has become widespread in the chemical, processing, oil and other branches of modern industry.

These include sewage, toothpaste, liquid soap, drilling fluids, etc. Usually these mixtures are heterogeneous. They contain large molecules capable of forming complex spatial structures. Exceptions are those prepared on the basis of potato or corn starch.

Making a non-Newtonian fluid at home

Water is required to create an emulsion. Usually the ingredients are used in equal parts, but sometimes the ratio is 1:3 in favor of water. After mixing, a liquid is obtained that resembles jelly in consistency and has interesting characteristics.

If you slowly put an object into a container with an emulsion, the result will be similar to immersing the thing in paint. By swinging well and hitting the mixture with a fist, one can note changes in its properties. The hand will bounce, as from a collision with solid.

spilled from high altitude the emulsion, in contact with the surface, accumulates in lumps. At the beginning of the jet, it will flow like an ordinary liquid. Another experiment is to slowly stick your hand into the composition and squeeze your fingers sharply. A solid layer forms between them.

You can put the brush up to the wrist in the suspension and try to pull it out sharply. There is a huge chance that the emulsion container will rise with your hand.

Using the Characteristics of a Non-Newtonian Fluid to Create a Slime

The first such was created in 1976. It gained immense popularity due to its unusual properties. Slime was both elastic, fluid and had the ability to constantly transform. Such qualities made the demand for the toy colossal among adults as well.

Quicksand - non-Newtonian desert fluid

They have the properties of solid and liquid bodies overnight due to the unusual configuration of grains of sand. The flow of water under quicksand whips up a loose layer of grains of sand until the mass of a traveler who has wandered to the bottom collapses the structure.

The sand is redistributed and begins to suck the person. Attempts to get out on their own lead to rarefaction of the air, with a titanic force pulling the legs back. The force required to release the limbs in this case is comparable to the weight of the machine.

The density of quicksand is greater than the density of groundwater. But you can't swim in them. Because of high humidity grains of sand form a viscous substance.

Any attempt to move causes a powerful reaction. The sand mass moving at a low speed does not have time to fill the cavity that forms behind the shifted object. It creates a vacuum. In response to sudden movements, the suspension hardens. Movement in quicksand is possible only if it is carried out very smoothly and slowly.

A Newtonian fluid is any fluid that has a constant viscosity, independent of the external stress that is applied to it. One example is water. For non-Newtonian fluids, the viscosity will change and directly depends on the speed of movement.

What are Newtonian fluids?

Examples of Newtonian fluids are slurries, suspensions, gels and colloids. The main feature of such substances is that the viscosity for them is a constant and does not change with respect to the strain rate.

The strain rate is the relative stress that a fluid develops as it moves. Most fluids are Newtonian and Bernoulli's equations for laminar and turbulent flows apply to them.

Strain rate

Shear-sensitive fluids are more fluid. The shear rate or the gap between the substance and the walls of the vessel, as a rule, does not greatly affect this parameter and can be neglected. The strain rate value is known for all materials and is a tabular value.

In some cases, however, it may change. For example, if the liquid is an emulsion that is applied to photographic film, then even slight imperfections can lead to spots and the final product will not have the desired qualities.

Various liquids and their viscosities

In Newtonian fluids, viscosity is independent of shear rate. However, for some of them, the viscosity varies with time. This is manifested by a change in pressure in a tank or pipe. Such liquids are called dilatant or thixotropic.

For latent fluids, the shear stress always increases, since their viscosity and increase in shear rate are interrelated. For thixotropic liquids, these parameters can change randomly. The strain rate cannot increase rapidly with decreasing viscosity. Therefore, the speed of movement of particles of matter can increase, decrease or remain the same. It all depends on the type of liquid. However, the strain rate tends to decrease. It means that

If you get bored and want something new and unusual - we offer you a very unusual way have fun - prepare a non-Newtonian fluid. This substance behaves very chaotically, hardens, becomes liquid, therefore, such an activity can be very interesting. Children will be especially interested school age, such an activity for them will be new, attractive and enjoyable.

How to make a non-Newtonian fluid with your own hands?

All we need to make our liquid is water and starch. Mix water and starch in equal proportions, and start stirring.

We got a white, liquid mass, we can pour it into the palm of our hand.

It does not give in to the laws of physics, then it freezes, then it spreads, this is the meaning of a non-Newtonian fluid.

What to do with non-Newtonian fluid?

Such a liquid is not used almost anywhere, it serves to simply entertain people. You can do interesting experiments with it. For example:

The faster you work with the mass, the harder it will be. For example, you can say it into a tube or a ball. She will become solid.

Slowly lower the big one and forefinger into the liquid, and sharply squeeze the fingers and raise them a little to the top, so we can see a hard lump.

If you pour this liquid from cup to cup, you will notice that the liquid is pouring from above, and it is already solidifying from below (cups must be kept away from each other).

Let's start with the fact that a Newtonian fluid is a substance that resists a strong impact on it and performs the function of a solid body, and with a slight effect acquires the properties of a liquid body. In fact correct name- a non-Newtonian liquid, since it consists of large molecules and has an inhomogeneous structure. You can even cook it at home. Let's try to figure out how to make a Newtonian fluid now.

Making a flubber or "rubber band" (other names for Newtonian fluid) is easy and great fun for kids. Such scientific fun contributes to the development of fine motor skills of the child and the activation of cognitive activity.

Ways to create a Newtonian fluid at home

So there are several simple ways to make Newtonian fluid:

You need to mix starch and water, and you need to knead such a mixture thoroughly, while adding water. If there is little water, then such a substance remains in a solid state for a long time, if you add a lot of water, then it will become liquid very quickly. It also happens that you have too much water in the bowl, then you need to wait a bit: the starch will settle, you can drain the excess water and then add some starch.

From the resulting material, try to make a ball, and if you roll it quickly, it becomes harder, if you do it slowly, it will spread over your hand.

The second way or "ordinary flubber"

In a separate bowl, pour 3/4 cup of water and one cup of PVA glue, mix these ingredients thoroughly and proceed to the next step.

In another bowl, you need to mix half a glass of water and 2 tablespoons of borax. Stir until the borax dissolves. Then combine the two resulting solutions and mix.

You can add dye. After that, it is necessary to place the resulting Newtonian fluid in a bag, close and stretch. The resulting substance can be stored in this form.

The third way is "smart clay"

For this method, you will need the following components: PVA glue, sodium tetrabarate, food coloring.

We take a bowl, pour glue (about 100 grams), add dye and mix. Next, you need to add sodium tetrabarate and mix until a dense mass is formed.

The fourth way "Edible Newtonian fluid"

We take a saucepan, pour condensed milk, put it on a slow fire, add a spoonful of starch, continuing to stir slowly. Once the liquid thickens, you can add food coloring and stir again. Leave the resulting liquid on the window to cool. Be careful as Newtonian fluid can stain clothes and other things.

We make an interesting non-Newtonian liquid from starch

Sorry, I got lost for a long time. So much has been mixed up in these few weeks!

Graduation at the son's kindergarten, at dances and at English courses.

As I have already said, I am collecting my son to school in the zero grade. We did not get into one school by competition, now we will try to arrange it in another.

Constant sores alternately either me or my son. As luck would have it, they are pouring down on us without ceasing, I'm already tired of this.

A small planned operation, which my son finally did yesterday, but the preparation for which took away so much strength from us, his parents, that in the end we didn’t want anything.

Again my spleen raised its head in half with a midlife crisis - I already thought that he was long in the past. It turned out that I was hoping in vain.

Again, all dreams and plans are going to hell, because events are changing at an unimaginable speed. You decide to do something tomorrow - and in the morning everything turns upside down and you only have time to solve problems that have appeared out of nowhere. I'm already even afraid to think of something for the upcoming ten-day vacation in July.

Again at work a wild blockage. You do one thing, before you have time to breathe a sigh of relief, another falls from a clear blue sky.

Again, a completely knocked down schedule at work due to the fact that some unforeseen situations constantly appear. So you have to work from the first shift, then from the second. As a result, the biological clock is knocked down completely.

Again, mutual misunderstanding with old friends who either appear or disappear, and you sit like a fool and puzzle over what it was?

In general, a lot of things, I don’t want to bore you with a listing. I’d rather give a piece of our summer in the city park - a birch grove with a lawn overgrown with celandine:

Well, today I want to tell you about the non-Newtonian fluid that we finally made with my son, when once again I had to stay at home, recover and look for something to do with this restless creature. I heard and read a lot about this interesting substance, but for some reason I was afraid to do it, it seemed to me that it was very difficult.

It turns out that do-it-yourself non-Newtonian liquid is very simple to make, and it will not be difficult to prepare it at home.

Why is it called so? I think it's better to ask the physicists, since it's still more physical experience than chemical, but I would venture to suggest that it's all about the properties. An ordinary liquid, obeying the classical laws of physics formulated by Newton, behaves as we are used to.

Imagine water. It flows, you can pour it from vessel to vessel, you can stamp your foot on it, raising clouds of spray, you can splash it, splash it in all directions - and it will remain unchanged in its physical properties, will always be liquid, flowing. There are many such examples - milk, gasoline, acetone, etc.

What is a non-Newtonian fluid? This is a substance that behaves completely unexpectedly when a force is applied to it. For example, in a calm state, it is a pliable fluid substance that can be poured on a table, forming an ordinary, unremarkable puddle.

But if you want to hit this puddle with your fist or, even better, with a hammer, you will encounter unexpected resistance - the soft puddle will suddenly become hard and may even shatter into fragments. That is, it turns into a solid body.

The properties of such a solution are associated with viscosity, or rather, with its change under external influence. As long as you do not apply any force to this solution and do not try to subject it to any deformation, then you will have an obedient liquid in your hands. As soon as you applied force, that is, changed the external influence, the viscosity instantly changed as well. Moreover, the higher the speed, that is, the faster you applied an external force, the more the viscosity will change.

Maybe I'm not explaining very well? Physicists, ay, respond, is it so or not?

The most common example of such a substance is starch mixed with water. How to make this interesting liquid out of it yourself? Those recipes and proportions that I came across, I, to be honest, did not follow. Everything was done “by eye”, but it turned out so interesting that my son and I spent almost the entire evening in the kitchen, playing with the resulting substance, cleaning up the table, walls, floor and even a little ceiling. But it was worth it. Both had joy - more than enough!

I bought in the market by weight corn starch. I can’t even tell who its manufacturer is, since it was an ordinary plastic bag without any identifying marks. We have 380 tenge for 1 kg, which is approximately 70 Russian rubles.

I poured it into a bowl and began to gradually add water, immediately stirring. At some stage, I felt that the spoon begins to turn with difficulty in this kind of “test”, as if in hardening cement.

She put down the spoon and began to try with her hands - if you slowly immerse your hand in the solution, it calmly sinks to the bottom of the plate. If you sharply hit the surface of the solution with your palm, it seems as if you are knocking on something solid, while the hand remains dry and clean.

They say that instead of corn, you can use potato starch. I fully admit it, but I can’t say anything from my experience, since I tried it only on corn. I think that it doesn’t matter, since, in fact, the composition is the same, in any case, a polymer solution is obtained (starch is a natural polymer), that is, large molecules that are interconnected in a variety of positions, which causes such interesting properties in the resulting solution.

So we did a variety of experiments with our son all evening. Very interesting tactile sensations, no less funny than with the same hydrogel.

They dipped their hands, spoons, forks into the solution. They hit the solution sharply, poured it slowly and quickly. If you put your hand under the jet during transfusion, the current jet instantly hardens, falling on your fingers.

Then I remembered that I once saved an article on how to cook homemade kinetic sand, there was also needed cornstarch. Why not give it a try now that you've started messing around in the kitchen? I just had clean, sifted sand, which I once prepared for experiments with “chemical snakes”.

All you need to do is mix sand, starch and water. Mixed - it turned out garbage. Not kinetic sand at all, but awesome convenient option a non-Newtonian fluid that doesn't get your hands dirty and yet doesn't lose its unusual properties.

It can be stirred, poured, rolled into koloboks, thrown on the table with force, beat on it with hands. For example, you can roll sausage - while you roll it in your hands, it is hard, as soon as you stop rolling it immediately turns into a puddle right in the palm of your hand.

In general, we played enough great, from the heart, with great pleasure. It was not even a pity to spend time laundering the kitchen afterwards - there was too much joy and good emotions. So, if you have not done such an experience so far, then try it, you will not regret it.

Well, I say goodbye to you, my readers ... I don’t know for how long. Most likely, there will be much fewer articles in the summer. I will try to “go on air” at least once a week, but I don’t know what will come of it. As I said, things are too unpredictable for me. And I can't figure out why.

Everyone have a nice summer and don't freak out!

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Surely you have heard of a non-Newtonian fluid, right? Even if you have not heard of this mysterious substance, you will probably be interested to know what it is and why it has such an unusual name.

How to make a non-Newtonian fluid at home: recipes

She possesses special properties and can take the form and consistency of both a solid and a liquid, depending on the impact. It is not clear why it received such a name, because its properties differ from the Newtonian fluid. It is called both Newtonian and non-Newtonian fluid. In any case, the recipes are the same, the properties too. It has a heterogeneous structure, it contains large molecules.

Newtonian fluid is popular among both children and adults. It will help pass the time and have fun.

How to make a Newtonian (non-Newtonian) fluid at home:

Recipe number 1. Mix potato starch in an amount of 250 grams and 100 grams of water room temperature in a bowl. Mix well, you should get a homogeneous mass without lumps. You can add food coloring to the Newtonian fluid if you like.

We roll a ball out of the mass, the faster you roll it, the harder it will be. As soon as you stop, it will again turn into a liquid mixture. Another option is to sculpt lumps from the mixture that will feel solid to the touch. But as soon as you stop sculpting, they immediately flow out through your fingers.

Try another experiment: dip your finger slowly into the mixture and you will see that it enters it. Now try to quickly hit it with your hand or fist and you will feel that it has become hard.

Another experiment: Pour the mixture onto a tray, put it on a music speaker and play music. You will see that under the influence of loud sounds, the mixture begins to move.

We throw the ball. If you have made a lot of non-Newtonian fluid in a bowl or bucket, we advise you to throw something into the container, for example, a ball. You will see that there will be no splashing.

Recipe number 2. Pour the liquid starch (dilute 1/3 cup starch in ¼ cup water) into the bag small size. Here we add food coloring, ¼ cup of PVA glue. Mix well, our Newtonian slime is ready to use.

How to explain such a phenomenon?

When squeezed, the starch molecules begin to combine, as a result, the mixture acquires a solid consistency. In the absence of compression, the molecules move freely and the mixture becomes liquid.

Now you know two simple prescription non-Newtonian fluid. We are sure that your kids will enjoy such experiments, but be prepared for the fact that the work surfaces will be dirty. Entertainment with starch will be interesting for adults too.

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A non-Newtonian fluid is a substance whose density directly depends on the velocity gradient. This phenomenon is due to the fact that the liquid consists of large molecules, which, in the absence of external influence float freely in water (the mixture remains liquid). When a mechanical stimulus appears, the distance between them is reduced, and the substance acquires the properties of solids. This behavior of some substances is also closely related to the complex spatial structure of molecules.

You can make a non-Newtonian fluid at home without applying special efforts. It is perfect for playing with children or even showing magic tricks.

How did this concept come about?

For the first time, Isaac Newton drew attention to the peculiarities of the viscosity of liquids. He noted that as the velocity of the fluid flow decreases, its resistance decreases. This data is easy to verify if you try to row quickly and slowly - the latter is definitely easier. Newton's work was the beginning of the study of the rheological properties of liquids, and at the same time, specific mixtures of large molecules were discovered that do not quite obey generally accepted laws. They were called non-Newtonian and began to be actively studied, in other matters, without much sense.

Cooking features

To create a non-Newtonian fluid at home, you should take cold water, starch (corn or potato - it doesn’t matter), a deep bowl. Cooking algorithm:

• Pour starch into a bowl (do not be afraid to pour more to get enough substance);
• Add water there and slowly stir the mixture;
• Water is added until a mass similar to jelly is obtained;
• Interfere better with hands, and you can also add a dye to obtain a colored substance;
• Stirring should be continued until a homogeneous mixture is formed.

To make sure you mix the water and starch properly, stir the mixture with your hand, gradually speeding up. The liquid will begin to solidify, and you will feel how the resistance will increase with increasing stirring force. As soon as the hand stops, the mixture will again become a regular liquid. After that, you can show the trick to the child and play with him.

A non-Newtonian liquid can be made with PVA glue and borax, but then you need to be careful so that the children do not pull an interesting thing into their mouths. To do this, you will need two glasses of water (one half full, the other three-quarters), a glass of glue and a tablespoon of borax. Glue is added to a fuller glass, and borax is added to half-filled. Both mixtures are thoroughly stirred and combined in one vessel. It is better to keep such a substance in the refrigerator, because it is not very convenient to cook it again every time.

How to play?

Having figured out how to make a non-Newtonian fluid at home, the question arises of what to do with it. Children can see for themselves the change in its properties as follows:

• Rolling a ball in your hands, which will feel like a solid body, but will immediately spread after the end of the impact;
• Kneading the mixture in your hands or pouring it from one vessel into another (if poured from a sufficient height, then in another vessel it will look more like hard clay);
• Using powerful speakers, on which the film is placed and liquid is poured (if you turn on the song with sufficient vibrations, you will get the so-called "jumping worms").

In the process of testing the liquid, take a deeper bowl and make a so-called toy pool. If the child tries to jump or run on the surface with it, then it will remain solid. But it is worth stopping, as the toy will sink, as if in ordinary water.

Can it be used somewhere?

Despite such interesting properties, the non-Newtonian fluid has not found its own practical application. Its characteristics are so unstable and difficult to predict that even in the age of technology, it is only suitable for playing with children.

The great advantage of the liquid is its complete safety, so parents can play even with babies. If it occurs to the baby to try an unusual substance, then there will be no harm from this. The exception is colored liquids, but if food coloring is used, then you can safely leave the child alone with such interesting game. The only thing: do not be surprised if, upon your return, you find a dirty child, a kitchen, and even a cat passing by.