Done by 7th graders
Alim Mokaev, Amiran Tumenov, Islam Boziev, Margarita Orakova
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Target: consider the operation of the law of communicating vessels using the example of the operation of circulation fountains.
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Tasks:
1. Study the material about fountains: their types and principles of operation.
2. Design a model of a circulation fountain
3. Create a collection of fountains in the city of Nalchik.
4. Analyze the information received and draw conclusions about the device and the principle of operation of the fountains.
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Methods:
Studying literary and other information sources, conducting experiments, analyzing information and results.
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Relevance of the problem
The effect of water on a person can be called truly magical. The murmur of the fountain relieves stress, calms and makes you forget about worries.
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Now the ideas of art have received a new incarnation - combining the ideas of architects, artists and specialists in high-tech areas .
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The device of the fountain is based on the principle of communicating vessels known to us from physics: In communicating vessels of any shape and section, the surfaces of a homogeneous liquid are set at the same level .
Water is collected in a container located above the fountain pool. In this case, the water pressure at the outlet of the fountain will be equal to the difference in water heights H1. Accordingly, the greater the difference between these heights, the stronger the pressure and the higher the jet of the fountain hits. The diameter of the outlet of the fountain also affects the height of the fountain jet. The smaller it is, the higher the fountain hits.
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circulation fountain
In circulating fountains, water runs in a vicious circle. Their main reservoir is located below. The water from the tank rises up the hose with the help of a pump. The hose runs inside and is not visible from the outside. Fountains based on the principle of circulation do not require water to be supplied to them. It is enough to pour water once, and then top up as it evaporates.
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natural fountains
geysers, springs and
artesian waters
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Artificial fountains:
street, landscape, interior
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Fountain in spa hotel
"Sindica"
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Fountain in front of the State Cinema and Concert Hall
Cinema fountain
"East"
Fountain on the avenue Shogentsukova
Fountain on the square of the 400th anniversary of reunification with Russia
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10 the most amazing fountains in the world
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Moonlight Rainbow Fountain (Seoul) - the longest fountain on the bridge
2. King Fahd Fountain (Jeddah) -
highest
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3. Dubai Fountain (Dubai) - the largest and most expensive
4. Crown Fountain (Chicago) -
the most international
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5. Fountains of Peterhof (St. Petersburg) - the most luxurious
6. Fountain of wealth (Singapore) - a fountain built according to feng shui
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7. Bellagio Fountain (Las Vegas) - America's most famous dancing fountain
8. Soaring Fountains (Osaka)
- the most airy
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9. Mercury Fountain (Barcelona)
- the most poisonous
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Experimental part of the work
Making a fountain is a problem, or a task that needs to be solved. Naturally, development problems arose immediately.
Hypothesis:
- To try to use the fact that in communicating vessels a homogeneous liquid is at the same level to make a fountain
- If the fountain will work, find out if the height of the fountain depends on the diameter of the tube
Results of work:
We want to present to your attention circulation fountains.
Conducted research: "Checking the dependence of the height of the fountain column on the diameter of the tube"
Conclusion:
The height of the fountain depends on the diameter of the tube. The smaller the tube diameter, the higher the fountain column.
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Conclusions:
1. All fountains use communicating vessels
2. In communicating vessels, a homogeneous liquid tends to be on the same level
3. The fountain beats due to the difference in water heights in communicating vessels
4. The difference between fountains is in the way water is supplied to the main tank
Results:
- Piggy bank fountains of the city of Nalchik
2. DIY circulating fountains
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The amazing creation of the ancient inventor Heron of Alexandria - the eternal fountain
Ancient Arabic manuscripts brought to us the story of the amazing creations of the ancient inventor Heron of Alexandria. One of them is a beautiful miracle bowl in the temple, from which a fountain spouted. No supply pipes were visible anywhere, and inside - mechanisms
The claimed invention is significantly different from the toys of Viktor Zhigunov (Russia) and John Falkis (USA), patented during the Cold War. Who knows, since such great powers were interested in this invention, whether it is a perpetual motion machine or simply one of the universal engines of the ancient Greek scientist Heron of Alexandria lost by mankind for 2000 years.
The purpose of the invention is to prove to the whole world that Heron's Fountain is not a myth or a primitive design, but a real, practically possible design that has been trying to unravel for 2000 years.
The claimed invention is intended to reveal the true design fountain of Heron, at the level of knowledge of ancient Greek scientists, which many scientists have been trying to uncover for 2000 years, to the present day, without visible mechanisms and supply pipes, which could create the effect of a perpetual motion machine.
Fountain of Heron consists of three glass vessels - outer 1, middle 2 and inner 3, but unlike the prototype of Viktor Zhigunov, placed one inside the other. The outer vessel 1 has the shape of an open bowl into which water is poured, so that the water hides two vessels 2 and 3 - glued together so that a vacuum 6 is formed and thermal insulation between the water from vessel 1 and the air in vessel 3. Also vessel 3 is the working capacity. There are two holes in the vessel 3 - from the top, where the tube is tightly inserted, to the bottom of the vessel and from the bottom, where the valve 5 is located. and the outer walls of the vessel 3 air, until the atmospheric pressure in the vessel 1 and the air pressure in the vessel 3 are equal. between vessels 2 and 3, the walls of vessel 3 and the air in vessel 3 are heated. The air in vessel 3 expands and pushes water out of vessel 3 through tube 4, forming a fountain. The water level in vessel 1 rises and accordingly
the atmospheric pressure of water in vessel 1 rises, so as soon as the equality of atmospheric pressure in vessel 1 and air pressure in vessel 3 is violated, water enters bowl 3 through valve 5, cools and compresses the air in vessel 3, the process repeats. Thus, in this invention, the energy of the sun's rays is converted into the movement of water. The fountain works every day, without visible mechanisms and
supply pipes.
The advantage is that the vessels do not have to be rearranged or turned over. The fountain operates every day without visible mechanisms and supply pipes, and in any place where the sun's rays fall.
Through the glass vessel 1 filled with water, it is difficult to see the inner glass vessels and creates the effect of a perpetual motion machine, which no scientist could repeat for 2000 years.
slide 2
Spring! There comes a wonderful time of warmth, flowering and bright colors after the winter "hibernation", fountains "wake up", thousands of water jets solemnly salute the dawn of nature. Last year I did research on the same topic, and this year I decided to continue it. Since I had a lot of questions: where did the first fountains appear? What types of fountains are there? Can you make your own fountain?
slide 3
I decided to conduct a study on the topic "Water extravaganza: fountains"
The purpose of the study: 1. Expand the area of personal knowledge on the topic "Communicating vessels" (including historical and polytechnical nature;) 2. Use the knowledge gained to perform creative tasks; 3. Select tasks on the topic “Pressure in liquids and gases. Communicating vessels". To achieve this goal, I need to solve the following tasks: 1. Study the history of the creation of fountains; 2. Understand the device and principle of operation of fountains; 3. Get to know pressure as the driving force behind fountains; 4. Make the simplest models of active fountains; 5. Create a presentation "Water extravaganza: fountains."
slide 4
The history of the creation of fountains
Fountain (from Italian fontana - from Latin fontis - source) - a jet of liquid or gas ejected under pressure (dictionary of foreign words. - M .: Russian language, 1990). For the first time, fountains appeared in ancient Greece. For seven centuries, people have been building fountains on the principle of communicating vessels. From the beginning of the 17th century, fountains began to be powered by mechanical pumps, which gradually replaced steam plants, and then electric pumps.
slide 5
Fountain of Heron
Fountains owe their existence to the famous Greek mechanic Heron of Alexandria, who lived in the 1st-2nd centuries. n. e. It was Heron who directly pointed out that the flow rate, or the rate, of the distributed water depends on its level in the reservoir, on the cross section of the canal and the speed of the water in it. The device invented by Heron serves as one of the samples of knowledge in antiquity (200 years before R. X.) in the field of hydrostatics and aerostatics.
slide 6
Pressure
In order to characterize the distribution of pressure forces, regardless of the size of the surface on which they act, the concept of pressure is introduced. p = F/S. Pour water into a vessel, in the side wall of which identical holes are made. We will see that the lower jet flows out to a greater distance, the upper one to a shorter one. This means that there is more pressure at the bottom of the vessel than at the top.
Slide 7
The principle of operation of communicating vessels.
The pressure on the free surfaces of the liquid in the vessels is the same; it is equal to atmospheric pressure. Thus, all free surfaces belong to the same level surface and, therefore, must be in the same horizontal plane. The principle of operation of communicating vessels underlies the operation of fountains.
Slide 8
Technical arrangement of fountains
Fountains are jet, cascade, mechanical, cracker fountains (for example, in Peterhof), of different heights, shapes, and each has its own name. Previously, all fountains were direct-flow, that is, they worked directly from the water supply, now “circulating” water supply is used, using powerful pumps. Fountains also flow in different ways: dynamic jets (they can change height) and static jets (the jet is at the same level).
Slide 9
fountain model
Using the properties of communicating vessels, it is possible to construct a fountain model. To do this, you need a water tank, a wide can 1, a rubber or glass tube 2, a basin from a low tin can 3.
Slide 10
slide 11
How does the height of the jet depend on the diameter of the hole and the height of the tank?
slide 12
The action of various models of fountains
Simplified model of Heron's fountain Homemade Heron's fountain
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Slide 14
Fountain when air is heated in a flask
When water is heated in the first flask, steam is formed, which creates excess pressure in the second vessel, displacing water from it.
slide 15
vinegar fountain
Fill the flask ¾ with table vinegar, throw a few pieces of chalk into it, quickly cork with a stopper with a glass tube inserted into it. From the tube will score a fountain
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Conclusion
In the course of the work, I answered the question: what is the driving force behind the work of fountains and, using the knowledge gained, was able to create various operating models of fountains, created a presentation “Water extravaganza: fountains”. The implementation of the work included the following elements: The study of special literature on the research topic. Refinement of the tasks of experience. Preparation of the necessary equipment and materials. Preparation of the object of study. Analysis of the obtained results. Finding out the significance of the results obtained for practice. Clarification of possible ways of applying the obtained results in practice.
Slide 17
Diamond fountains are flying With a merry noise to the clouds, Under them idols shine... Crushing against the marble barriers, Like a pearl, a fiery arc Waterfalls fall and splash. AS Pushkin Theoretical preparation for the experiment and the analysis of the obtained results required from me a complex of knowledge in physics, mathematics, and technical design. It played a big role in enhancing my educational preparation.
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Goals:
developing
- development of creative abilities of students (imagination, observation, memory, thinking); development of the ability to establish interdisciplinary connections (physics, history, MHC, geography); development of fine motor skills in the design of models;
- repeat the basic properties of communicating vessels; determine the reason for the installation of a homogeneous liquid at the same level in communicating vessels of any shape; indicate the practical application of communicating vessels; disassemble the principle of operation of the fountain of Heron
- learn to see the beauty in the world around you; create a sense of responsibility for the assigned work; educating the ability to listen and hear; increase the general intellectual level; promote interest in physics
- Video presentation of fountains
- Introduction
They say there are three things that you can look at endlessly - fire, stars and water. The contemplation of water - whether it is the mysterious depth of a smooth surface, or transparent jets, rushing and rushing somewhere, as if alive - is not only pleasant for the soul and beneficial for health. There is something primitive in this, why a person always strives for water. It is not for nothing that children can play for hours even near an ordinary rain puddle. Why are fountains so drawn to themselves? So magically bewitching? Maybe because in the rustling, rustling, noise of their pouring jets you can hear the laughter of a mermaid, the stern cry of a water king or a splash of a goldfish? Or because the beating foam jets awaken in us the same joy and delight as springs, streams and waterfalls. The air near the reservoir is always clean, fresh and cool. And it is not in vain that they say that water “cleanses”, “washes”, not only the body, but also the soul.
Probably, everyone noticed how much easier it is to breathe near the water, how fatigue and irritation disappear, how invigorating and at the same time pacifying being near the sea, river, lake or pond. Already in ancient times, people thought about how to create artificial reservoirs, they were especially interested in the riddle of running water.
- The history of the development of fountains
The first fountains appeared in ancient greece. They had a very simple device, and did not look at all like the magnificent fountains of our time. Their purpose was purely practical. Supply cities and towns with water. Gradually, the Greeks began to decorate their fountains. They covered them with tiles, built statues, achieved high jets. Fountains have become an attribute of almost every city. Lined with marble, with a mosaic bottom, they were combined either with a water clock, or with a water organ, or with a puppet theater, where the figures moved under the influence of jets. Historians describe fountains with mechanical birds that sang merrily and fell silent when an owl suddenly appeared.
Following the ancient Greeks, fountains began to be built in Rome. The word fountain itself has Roman roots. The Romans greatly improved the arrangement of fountains. For fountains, the Romans made pipes from fired clay or lead. During the heyday of Rome, the fountain became an obligatory attribute of all rich houses. The bottom and walls of the fountains were decorated with tiles. Jets of water shot from the mouths of beautiful fish or exotic animals.
The development of fountains was facilitated by the invention by the ancient Greek mechanics of the law of communicating vessels, using which the patricians arranged fountains in the courtyards of their houses. Decorative fountains of the ancients can be safely called the prototype of modern fountains.
After the fall of the ancient world, the fountain again turns into only a source of water. The revival of fountains as an art begins only during the Renaissance. Fountains become part of architectural ensemble, its key element.
The most famous are the fountains of Versailles in France and Peterhof in Russia.
Modern fountains are beautiful not only during the day, when they shine and sparkle in the sun, but also in the evening, when they turn into color-musical water fireworks. Invisible lamps immersed in water make its jets either pale lilac, or bright orange, almost fiery, or sky blue. Multi-colored jets beat and make sounds that merge into a melody...
F. I. Tyutchev.
FOUNTAIN
See how the cloud is alive
The shining fountain swirls;
How it burns, how it crushes
Its in the sun wet smoke.
Rising to the sky with a beam, he
Touched the cherished height -
And again with fire-colored dust
To fall to the ground is condemned.
About the mortal thought of a water cannon,
O inexhaustible water cannon!
What law is incomprehensible
Does it aspire to you, does it bother you?
How greedily you are torn to the sky!
But the hand is invisibly fatal
Your ray is stubborn, refracting,
It overthrows in spray from a height.
- How the fountain works
Experiment with tube and funnel
QUESTIONS to children (tasks)
Task 1. Historical. The inhabitants of modern Rome still use the remains of the aqueduct built by their ancestors. But the Roman plumbing was not laid in the ground, but above it, on high stone pillars. Engineers were afraid that in reservoirs connected by a very long pipe (or gutter), the water would not be at the same level, that, following the slopes of the soil, in some areas the water would not flow upward. Therefore, they usually gave the water supply a uniform downward slope all the way (for this, it was often necessary to either lead the water around, or build high, strong supports). One of the Roman pipes has a length of 100 km, while the direct distance between its ends is half that.
? Were the engineers of ancient Rome right? If not, what is their mistake?
Task 2. Construction. You have a ruler and communicating vessels filled with liquid at your disposal.
? How to use them to draw a strictly horizontal line on the board? Show it off. Think about where in practice you might encounter such a problem.
Fountain in rarefied air experience
Fountain of Heron
One of the devices described by the ancient Greek scientist Heron of Alexandria was Heron's magical fountain. The main miracle of this fountain was that the water from the fountain beat itself, without the use of any external source of water. The principle of operation of the fountain is clearly visible in the figure. Let's take a closer look at how Heron's fountain worked.
Heron's Fountain consists of an open bowl and two hermetic vessels located under the bowl. From the upper bowl to the lower container, there is a completely sealed tube. If you pour water into the upper bowl, then the water begins to flow through the tube into the lower container, displacing air from there. Since the lower container itself is completely sealed, the air pushed out by the water, through a sealed tube, transfers air pressure to the middle bowl. The air pressure in the middle tank starts pushing the water out and the fountain starts to work. If to start work, it was necessary to pour water into the upper bowl, then for the further operation of the fountain, the water that fell into the bowl from the middle container was already used. As you can see, the device of the fountain is very simple, but this is only at first glance.
The rise of water into the upper bowl is carried out due to the pressure of water with a height H1, while the fountain raises the water to a much greater height H2, which at first glance seems impossible. After all, this should require much more pressure. The fountain should not work. But the knowledge of the ancient Greeks turned out to be so high that they guessed to transfer the pressure of water from the lower vessel to the middle vessel, not with water, but with air. Since the weight of air is much lower than the weight of water, the pressure loss in this area is very small, and the fountain shoots from the bowl to a height H3. The height of the fountain jet H3, without taking into account the pressure losses in the tubes, will be equal to the height of the water pressure H1.
Thus, in order for the fountain water to hit as high as possible, it is necessary to make the fountain structure as high as possible, thereby increasing the distance H1. In addition, you need to raise the middle vessel as high as possible. As for the law of physics on the conservation of energy, it is fully respected. Water from the middle vessel, under the influence of gravity, flows into the lower vessel. The fact that she makes this way through the upper bowl, and at the same time beats there with a fountain, in no way contradicts the law of conservation of energy. As you understand, the operating time of such fountains is not infinite, eventually all the water from the middle vessel will flow into the lower one, and the fountain will stop working. On the example of Heron's fountain, we see how high the knowledge of the scientists of ancient Greece was
- Fountains of Peterhof
In the east there are the Monplaisir Palace, the cascade "Chessboard Mountain" and "Roman" fountains, the fountains "Pyramid", "Sun", cracker fountains. In the western part there are the Hermitage pavilion and the Marly Palace, the Golden Mountain cascade, the Menager fountains and the Cloches. It was not by chance that Peter chose this particular place for the construction of Peterhof. Examining the area, he discovered several reservoirs fed by springs spouting from the ground. During the summer of 1721, locks and a canal were built, through which water flowed by gravity from reservoirs from the Ropsha Heights to the storage pools of the Upper Garden, and here it was possible to arrange only small jets-fountains. Another thing is the Lower Park, spread out at the foot of the terrace. Water from a 16-meter height through pipes from the pools of the Upper Garden, according to the principle of communicating vessels, rushes down with force to soar in many high jets in the fountains of the park. In total, there are 4 cascades and 191 fountains in the Lower Park and the Upper Garden (including cascade water cannons).
The principles of water supply found by Peter the Great are still in effect today, testifying to the talent of the founder of Peterhof.
During the Great Patriotic War, the fascist invaders completely destroyed the fountain system of Petrodvorets. They removed and removed sculptures, including the famous sculpture "Samson", which was cut into pieces and also sent to Germany, cut out lead pipelines in many places, stripped lead sheets from the thresholds of the Grand Cascade, removed nozzles, as well as all fittings from colored metals Fortunately, a significant part of the sculptures and other works of art were evacuated in a timely manner.
The Soviet Army, which liberated Petrodvorets, found only ruins there; the fountain system was destroyed by 80 percent. Currently, as a result of extensive restoration work, the main fountains of Petrodvorets have been restored.
- Fountains in literature
Fountains have long attracted artists and poets. Many poems have been written about these magical jets of water. One of the famous poems is a poem by A.S. Pushkin "Fountain of Bakhchisarai" (excerpt)
Fountain of love, fountain alive!
I brought you two roses as a gift.
I love your silent voice
And poetic tears.
your silver dust
Cold dew sprinkles me:
Ah, flow, flow, the key is gratifying!
Murmur, murmur your story to me ...
Our children were also invited to try themselves as poets. Let's hear what came of it.
Poems guys
- Conclusion
etc.................