If you think physics is a boring and unnecessary subject, then you are deeply mistaken. Our entertaining physics will tell you why a bird sitting on a power line does not die from electric shock, and a person caught in quicksand cannot drown in it. You will find out whether there really are no two identical snowflakes in nature and whether Einstein was a poor student at school.
10 interesting facts from the world of physics
Now we will answer questions that concern many people.
Why does a train driver back up before moving off?
This is all due to the force of static friction, under the influence of which the train cars are standing motionless. If the locomotive simply moves forward, it may not move the train. Therefore, it slightly pushes them back, reducing the static friction force to zero, and then accelerates them, but in a different direction.
Are there identical snowflakes?
Most sources claim that there are no identical snowflakes in nature, since their formation is influenced by several factors: air humidity and temperature, as well as the flight path of the snow. However, interesting physics says: it is possible to create two snowflakes of the same configuration.
This was experimentally confirmed by researcher Karl Libbrecht. Having created absolutely identical conditions in the laboratory, he obtained two externally identical snow crystals. True, it should be noted: their crystal lattice was still different.
Where in the Solar System are the largest reserves of water?
You'll never guess! The largest reservoir of water resources in our system is the Sun. The water there is in the form of steam. Its highest concentration is found in places we call “sunspots.” Scientists even calculated: in these areas the temperature is one and a half thousand degrees lower than in other areas of our hot star.
What invention of Pythagoras was created to combat alcoholism?
According to legend, Pythagoras, in order to limit the consumption of wine, made a mug that could be filled with an intoxicating drink only to a certain level. As soon as you exceeded the norm by even a drop, the entire contents of the mug flowed out. This invention is based on the law of communicating vessels. The curved channel in the center of the mug does not allow it to be filled to the brim, “riding” the container of all contents when the liquid level is above the bend of the channel.
Is it possible to turn water from a conductor into a dielectric?
Interesting physics says: it’s possible. Current conductors are not the water molecules themselves, but the salts contained in it, or rather their ions. If they are removed, the liquid will lose its ability to conduct electricity and become an insulator. In other words, distilled water is a dielectric.
How to survive a falling elevator?
Many people think that you need to jump when the cabin hits the ground. However, this opinion is incorrect, since it is impossible to predict when the landing will occur. Therefore, entertaining physics gives another advice: lie with your back on the floor of the elevator, trying to maximize the area of contact with it. In this case, the force of the impact will not be directed to one area of the body, but will be evenly distributed over the entire surface - this will significantly increase your chances of survival.
Why doesn't a bird sitting on a high voltage wire die from electric shock?
Birds' bodies do not conduct electricity well. By touching the wire with its paws, the bird creates a parallel connection, but since it is not the best conductor, charged particles do not move through it, but along the cable conductors. But if the bird comes into contact with a grounded object, it will die.
The mountains are closer to the heat source than the plains, but at their peaks it is much colder. Why?
This phenomenon has a very simple explanation. The transparent atmosphere allows the sun's rays to pass through without hindrance, without absorbing their energy. But the soil absorbs heat well. It is from this that the air then warms up. Moreover, the higher its density, the better it retains the thermal energy received from the earth. But high in the mountains the atmosphere becomes rarefied, and therefore less heat is retained in it.
Can quicksand suck you in?
There are often scenes in films where people “drown” in quicksand. In real life, says entertaining physics, this is impossible. You won’t be able to get out of a sandy swamp on your own, because to pull out just one leg, you’ll have to put in as much effort as it takes to lift a medium-weight passenger car. But you won’t be able to drown either, since you’re dealing with a non-Newtonian fluid.
Rescuers advise in such cases not to make sudden movements, lie down with your back down, spread your arms to the sides and wait for help.
Does nothing exist in nature, watch the video:
Amazing incidents from the lives of famous physicists
Outstanding scientists are mostly fanatics of their field, capable of anything for the sake of science. For example, Isaac Newton, trying to explain the mechanism of perception of light by the human eye, was not afraid to experiment on himself. He inserted a thin ivory probe into the eye while pressing on the back of the eyeball. As a result, the scientist saw rainbow circles in front of him and thus proved: the world we see is nothing more than the result of light pressure on the retina.
Russian physicist Vasily Petrov, who lived in the early 19th century and studied electricity, cut off the top layer of skin on his fingers to increase their sensitivity. At that time, there were no ammeters and voltmeters that made it possible to measure the strength and power of current, and the scientist had to do it by touch.
The reporter asked A. Einstein whether he writes down his great thoughts, and if he writes them down, where - in a notebook, a notebook or a special card index. Einstein looked at the reporter’s voluminous notebook and said: “My dear! Real thoughts come to mind so rarely that it is not difficult to remember them.”
But the Frenchman Jean-Antoine Nollet preferred to experiment on others. Conducting an experiment in the mid-18th century to calculate the speed of transmission of electric current, he connected 200 monks with metal wires and passed voltage through them. All participants in the experiment twitched almost simultaneously, and Nolle concluded: the current runs through the wires very, very quickly.
Almost every schoolchild knows the story that the great Einstein was a poor student in his childhood. However, in fact, Albert studied very well, and his knowledge of mathematics was much deeper than what the school curriculum required.
When the young talent tried to enter the Higher Polytechnic School, he scored the highest score in the core subjects - mathematics and physics, but in other disciplines he had a slight deficiency. On this basis he was refused admission. The next year, Albert showed excellent results in all subjects, and at the age of 17 he became a student.
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Physics Quiz
for students in grades 10-11
1. Make pairs using the example: Aladdin's lamp.
Match each word from the column on the left with a proper name from the column on the right to get a similar expression.
Rays
Answers: X-rays, Archimedes' law, Morse code, Wilson chamber, Doppler effect, Yablochkov candle, Torricelli void, Shukhov tower, engineer Garin's hyperboloid, Avogadro's number, Bohr's postulates, Newton's rings, Geiger counter, Foucault pendulum, Carnot cycle, Pauli principle, vibrator Hertz, Kelvin scale, Brownian motion, Lissajous figures, Young's modulus, Popov's radio, Lomonosov's molecular kinetic theory, Planck's constant, Stoletov's photoelectric effect, Lebedev's light pressure, Rutherford's planetary model of the atom, Ampere's current strength, Boltzmann's constant, Kurchatov's atomic reactor, voltage Volta, Jacobi's first electric motor, Mendeleev-Clapeyron's equation of state for an ideal gas, Ladygin's incandescent electric lamp, Ohm's law for a section of a circuit, the first cosmonaut Gagarin.
2. Physics-lyrics
A) Draw an analogy to A. Akhmatova’s poem.
I pray to the window ray - it is pale, thin, straight.
Which device produces a thin, straight beam? (laser)
B) N.A. Nekrasov. “Who lives well in Rus'”
No one has seen him, but everyone has heard him,
Without a body, but it lives, without a tongue, it screams.
What phenomenon are we talking about? (echo)
B) Full name Tyutchev "Calm"
The storm passed - still spinning, he lay
A tall oak tree, struck down by Perunami,
And gray smoke ran from its branches
Along the greenery, refreshed by the thunderstorm.
What phenomenon struck the oak tree? (lightning)
D) Guess the title of I.A.’s poem. Bunina.
But no matter where, in the wind and fog, foam was thrown over the side,
I believe he will catch you again Nord , fast asleep, tossing around on the sofa. ("Compass")
D) V. Ya Bryusov. Death of the knight Lancelot.
The knights grab their swords and cut from the shoulder.
Like sparks from a night candle, so are sparks from a sword.
What phenomenon causes sparks to appear from swords? (friction)
3. Living sculpture
Students are divided into groups and each group must depict an event or physical phenomenon and find out what their opponent has wished for.
4. Song competition “Earthlings”.
This paper presents materials on physics for conducting a quiz between 9th grade students during subject weeks, in physics clubs, and in extracurricular physics activities. As homework, it is expected to announce to students the requirements and content of stage 1 “Business Card Competition” and stage 5 “Creative” two weeks in advance. This material can be used to conduct a remote telecommunications project.
Our quiz will allow students to think about those things that previously escaped their attention, see the “unusual” in the “ordinary”, get acquainted with some interesting facts from the life of physicists, solve a crossword puzzle and even be surprised. The quiz tasks will help you look beyond the boundaries of the subject and promote the development of logical thinking and creativity.
Purpose of the quiz: Activation of students' activities, development of interest in physics, deepening of knowledge.
- Review basic concepts, formulas, units of measurement, physical laws.
- Study the biography of scientists, get acquainted with their discoveries.
- Show independence, creativity and ingenuity when solving physical problems and creative tasks.
Stage 1 “Business Card Competition”
Business card requirements: At this stage, the teams introduce themselves to each other.
The business card should have a theme: “Structure of matter.” The business card should contain the team name, motto, logo, a story about the team members, teachers, educational institution and correspond to the given topic.
This could be a text file, a presentation.
Stage 2 “From the pages of the textbook.”
Task No. 1: solve the crossword puzzle:
Horizontally:
- Air envelope of the Earth
- Depth of vessel immersion in water
- What a body has if it can do work
- Unit of force
- Device for measuring liquid density
- Mass measuring device
- Physical quantity equal to the ratio of body mass to its volume
- Scientist who first measured atmospheric pressure
If you correctly guessed the words horizontally, then vertically you will get the name of the device.
Task 2
An anagram is a word or phrase formed by rearranging the letters or syllables of another word or phrase. You need to get a completely new word from a word by rearranging letters or syllables, or by reading it backwards (from right to left), for example, fox-strength.
1. It’s not for nothing that you love this time of year.
Good weather, hiking, camping.
But swap the letters -
And we will receive the item with you.
2. From left to right you will read-
In winter he sits on the stove.
Read back and find out -
Runs along a wire without legs.
3. Maybe we rode by chance
Someday you too will be in me.
My wheels quickly raced through the streets of the former Moscow.
But there's only room for two letters
You will change me -
I will quickly take off with a bang
And I will rush to the heights
The answer to the second task will be pairs of words for each anagram
Task 3
In this task you will have to answer questions and present mathematical calculations (if the task requires it).
1. In the fall, double frames are installed for the winter and the windows are sealed. Air is a poor conductor of heat. Therefore, perhaps it would be better if the distance between the frames was immediately increased during the construction of the building, then the air layer would be thicker and warmer. Why doesn't anyone do this in practice?
2. Andrey measured the thickness of the layer of snow that fell in the garden over the winter. It turned out to be on average about 58 cm. From experience, he determined that the “looseness” is approximately such that a layer of snow of 1 cm, melting, forms a layer of water of 1 mm. Then Andrey calculated how much heat is required to melt the snow covering 1 m 2 of the Earth's surface. How much will he get in kcal?
3. Vova took two coins, one ruble and one five ruble. Then he climbed onto a chair, raised the coins up to the same height and at the same time, on the count of “one,” released them from his hands. Which coin will hit the floor first?
4. Name the smallest unit of length used in practice.
Task 4
The figures show a number of physical phenomena.
Each has its own calculation formula.
1. F=GM m/r 2 7. M= F L
2 .F= m v 2 /r 8. t = m 1 t 1 + m 2 t 2 / m 1 + m 2
3. I = I 1 + I 2 + I 3 9. F = m a
4. n = sin / sin 10.< = <
5. E = m v 2 / 2 11. a 1 / a 2 = m 2 / m 1
6.Q = I 2 R t 12.T = 2
For each picture, provide a formula that allows you to calculate the action depicted in it. Present the answers in table form:
Stage 3 “People of Science”
The science of physics has gone through a long and complex path of development - from Egyptian and Babylonian monuments to nuclear power plants, lasers and space flights, etc. Humanity has passed and is going through a long and difficult path from ignorance to knowledge. The desire for knowledge and curiosity are inherent in human nature. But if there were no great people, physicists, thanks to whose actions we can explain, imagine, describe much in our world, then there would be no science. Any science is the sum of knowledge achieved by many people of past generations and contemporaries: it is the result of collective work. For the further development of science and technology, to understand the size and essence of the changes taking place, it is important to look back at the past of science. The third stage is called “People of Science”. You will have to find out from the descriptions, photographs - scientists - physicists, and name their inventions. Play the role of a scientist and write his report.
Exercise 1:
Photos of scientists are presented to your attention. You have to write the last name, first name, patronymic of the scientist, years of life, what achievements he is known for.
Task 2
At this stage, participants will have to determine from the description, or invention, or statement of another person which scientist they are talking about. Name him in full (full name).
1. Russian inventor of the light bulb.
2. In 1876, new light sources appeared on the streets of Paris.
Placed in white matte balls, they gave a bright, pleasant light, which was called “Russian light”, “Russian sun”.
This “candle” was an arc lamp, but without regulators.
Who is the creator of such candles?
3. On his monument it was written “Increased the power of man over nature,” since he was the creator of the first universal steam engine.
4. Reflecting on the processes occurring in the human body (depending on the temperature conditions in which a person is located), and the energy released in it during the “combustion” of food, this scientist discovered one of the most fundamental laws of physics - the law of conservation and transformation of energy.
5. The famous Greek scientist who lived in the 4th century BC was called the “father of sciences,” although some of his judgments do not coincide with those currently accepted. For example, he believed that if a second stone is placed on top of the first one, the stone lying on top will push the lower one, as a result of which the speed of the lower one will increase. Meanwhile, it is now known that all bodies, regardless of their mass, fall with the same acceleration.
6. He discovered one of the most important laws of electricity in 1785, using torsion balances. The technique he used once again proves that the ingenuity of the human mind knows no bounds.
7. He was famous for his absent-mindedness. It was said about him that once, with a concentrated look, he boiled his watch in water for 3 minutes, holding an egg in his hand.
8. A brewer by profession, he was an excellent experimenter, studied the laws of heat release by electric current, and made a great contribution to the kinetic theory of gases.
9. At first he studied poorly at school and took second to last place on the list of academic achievements. However, after a fight with a classmate, he decided to prove that he could become the best student at school. And so he became.
Moreover, he became an outstanding scientist, who owns a work called
“Mathematical principles of natural philosophy.”
10. About which Russian scientist did our great poet A.S. Pushkin say that he created the first university in Russia, that “it would be better to say, he himself was the first Russian university”?
11. Which future famous American physicist, who studied Greek and dreamed of becoming a philologist, was asked to teach physics, since “whoever learns Greek well can teach physics”
Task 3 “Creative”
Present the report of scientist E. Torricelli on the measurement of atmospheric pressure to the scientific council.
Stage 4 “Questions for physics experts.”
So, before you is stage 4 “Questions for physics experts.”
And they will be asked to you by: a tourist, a hostess, a biologist and an astronaut. Be resourceful, show your erudition and try to answer the questions. Good luck to you in this difficult task!
Questions from an amateur tourist:
1. How can we explain that when walking along a clayey country road muddy from rain (or through a swamp), it is difficult to pull your feet out of the mud?
2.Why shouldn’t tourists leave water in a glass bottle outside in winter?
3. Why do we blow on the flame of a match when we want to extinguish it, and blow even harder on the coals of a fire when we want to rekindle it?
4.Can you start a fire with ice?
5Why does a loaded ship move slower than an unloaded one?
Hostess questions
1. Why do pickled fruits and vegetables in a closed jar look larger than they actually are?
2.Why is the lower part of the iron, called the “sole,” made massive and metal?
3.Which will cool faster - a bathtub filled with hot water or a glass of hot tea? Explain your answer.
4.Why do food left uncovered in the refrigerator dry out quickly?
5.Why is the pillow soft?
Astronaut questions:
1. Will the air density in the cabin of a spacecraft change in a state of weightlessness?
2. The astronaut left the ship into space and, with the help of an individual rocket engine, takes a walk around the surrounding area. Returning, he left the engine on a little too long, approached the ship with excess speed and hit his knee on it. Will it hurt him?
3.Is it possible to use an internal combustion engine for interplanetary flights?
4. Will an astronaut in a flying spaceship be able to pour water from one vessel to another in the usual way?
5.Can two astronauts walking into outer space communicate in the usual way?
Biologist Questions
1Why do bats, flying in complete darkness, not run into obstacles?
2.How do sharks use Ohm’s law to navigate in the water and to hunt?
3.Can deep-sea fish see?
4. Is it true that the hare sees objects behind him?
5.Why does a dog running in the heat stick out its tongue?
Stage 5 “Creative”
The last task will allow you to show your wild imagination, wit, and resourcefulness.
You have to come up with an exciting journey through a fairyland. Where is it? It's up to you to decide. Maybe it's somewhere on Earth, or maybe in space. Famous fairy-tale characters or you yourself will go on a trip. Come up with the name of the country, its fabulous inhabitants, and places of stay for travelers. On their way, they may encounter various difficulties that they will have to overcome, applying knowledge of physics; perhaps they will observe various natural phenomena, which are also explained by the laws of physics. Think of the type of transport they will use to travel, take care of what they will take with them on the road. Theme of the trip: “Mechanical and thermal phenomena.”
To carry out a telecommunications project, it is necessary to specify technical requirements and evaluation criteria for each stage.
Tournament of scholars in physics (10-11 grades) Anokhina G.I.
Target:development of students' cognitive interest, theiractivities, broadening one’s horizons, repeating the material covered.
Progress of the game
Introducing teams by captains, motto- 3 points
Warm up.
All team members participate. Within 1 min. teams are asked questions, players must answer them. If they find it difficult, they say: “Next.” The team's task is to give as many correct answers as possible. In case of an incorrect answer or its absence, the presenter himself gives the correct answer. For each correct answer 1 point. During the warm-up, the total number of points scored by each team is calculated and the game score is reported.
Grade 10.
1. The air shell of the earth (atmosphere)
2. What is a small amount of water (drop) called?
3. In what units is the mass of an atom measured in SI (kg)
4. Where is the end of the world? (where the shadow begins)
5. Numerical values of the first escape velocity for the earth. (~ 7.9 km/s)
6. Substance burned to produce heat (fuel)
Grade 11.
1. Who speaks all languages? (echo)
2. The scientist after whom the unit of energy (Joule) is named
3. Device for measuring body weight (scales)
4. What is visible if nothing is visible? (fog)
5. What a magnet has (pole)
6. A thin tube through which the liquid rises under the influence of surface forcetension (capillary)
3. Physicists - seekers (riddles with hints)
First they read the question, if there is no answer, I give a hint. If there is any difficulty, I’ll give you one more.
There are not hints for all questions, sometimes there are two, sometimes -
one. If you give the answer right away, you get 5 points, if after the first hint - 1 point less, after the second - 2 points less.
Grade 10.
1. Everyone has it. Decreases with work. If you eat a Snickers, it will increase. You can’t measure it with scales and a ruler.
Hint 1: The same Snickers will give everyone more money
the same for both tall people and short people,
both girls and boys.
Hint 2: And if you eat potatoes instead of Snickers, then
the increase will be less. (energy).
2. He happens in space, at home, on the street, in the classroom too. There are cars, often outside. It's boring at home without him. It can be natural and artificial. Without him it would be dark.
Hint 1: Without him, no one would work.
And we wouldn't study.
With him, it’s not scary in the forest at night.
The owl and the bat don't like him. When it is present, children sleep poorly.
Hint 2: Cats don't really need it. In summer it's very
a lot of. Not enough in winter. Plants grow without it
white. It can be red, white and
green (light).
Grade 11.
1. Because of this type, the law of conservation of mechanical energy is often violated.
Hint 1: He is often scolded.
Hint 2: But they often thank you.
Hint 3: Without it, we cannot even move from place (friction).
2. Without it, people die, plants too, children get the flu. To get it, our grandparents used to knead cow dung in troughs, make bricks out of them, dry them, and then burn them. And now factories with pipes are needed for this.
Hint 1: When there is a lot of it, you want to take a shower. When
very little, we cannot live. He has a strange
behavior: there is always more of it at the top than at the bottom
Hint 2: When it is there, all people are cheerful and want to
work and school, and when he is not there, the children hide
home. Animals and plants receive it
from the sun (heat).
4. Historical and physical quiz
(physicists’ questions about historical facts and events).- 4 b.
Grade 10.
1. In 907, the Kiev prince Oleg and his squad went on a campaign against Byzantium. Having learned about this, the Byzantines closed the harbor of Constantinople with a chain, blocking the path of alien ships. Then the prince ordered his ships to moor, where possible, to the shore and “put” the ships on wheels. The order was carried out. And the ships “rushed” to the city on land.
? Question: What could set the ships in motion?
(the ship could be driven forward by a tailwind).
2. One of the defenders of Sevastopol, besieged by the Nazis during the Great Patriotic War, was Marine Corps reconnaissance officer I.P. Dmitrishin recounted the following episode: a heavy German shell hit the slope of the mountain (“height”) where our soldiers were located. Undershoot. But... stones rolled from the explosion site. One of them below blew up a German mine located in a large minefield surrounding the “height”.
? Questions: What idea could have been inspired by the explosion of this mine among our soldiers holding back the enemy’s advance? How to explain the meaning of this idea with
physics point of view? (Our soldiers could try to clear a path through the minefield using stones - boulders. These stones, dislodged and moving down the slope from “height”, could acquire a large
speed due to the conversion of its potential energy into kinetic energy. Their strikes on mines are capable of detonating the latter. Moreover, each boulder could carry others along with it, creating a stone avalanche - “demolitionists”).
Grade 11.
1. Episode of the Battle of Kulikovo (1380). The leading Russian regiment was supposed to take the main blow of the enemy. The leader of the Russian army, Prince Dmitry Donskoy, thought out well the weapons and battle tactics
wars of this regiment. Several rows of warriors used shields and spears of different lengths, creating a “protective wall” from them. The spears in front were shorter, those in the back were longer. The advancing Tatar-Mongol cavalry encountered more than one spear, but ran into several at once; mortal wounds were inevitable.
? Question: What physical phenomena “participated” in this
the plan of Prince Dmitry? (pressure of sharp spears,
“resistance” of solid shields).
2. In the documentary story of Guard Lieutenant I.M. Zhurba talks about this fact from the time of the last Patriotic War. When repelling one of the Nazi attacks, ours knocked out an enemy armored personnel carrier, in which the soldiers found about 60 rubber bands. Looking at these seemingly useless tourniquets from I.M. Zhurba came up with an idea: to create “small-caliber artillery” using bundles and tree branches; using lemon grenades as projectiles.
? Questions: How could this idea be realized, how to explain it? (Make large, strong slingshots from massive branches and tie the ends of rubber bands to them. Drive the slingshots into the ground. Place a lemon pomegranate into each bundle. One soldier must pull the tourniquet, the other must open the ring of the grenade, pull the pin, and launch the “projectile”. The release of the grenade was ensured by the elastic force that arises in the rope when it deforms during the stretching process).
5. From the story of Sherlock Holmes ( 3 points )
Grade 10.
1. Look, Watson, there are coins at the bottom of the bottle. They were placed there by a fraudster whose business I was in charge of. He was cunning, and in order not to waste his money, he showed a bottle of coins in the tavern. I turned it over, but
the coins did not fall out. Then he said that he would pay later and left.
Sherlock Holmes turned the bottle over and tried to get at least one coin, but nothing came of it.
? How did the previous owner of the bottle manage to put coins in it? (he could do this by heating the neck of the bottle and at the same time greatly cooling the coins).
2. Sherlock Holmes continued to remove things from his box. On the table besides them stood a silver coffee pot and a cup of coffee, polished to a shine. He took a sip of coffee and continued:
Look, friend Watson, at the cane you
hold in your hands. It was a thick black cane with a heavy
knob - one of what Sherlock Holmes calls "strong evidence."
The thick iron tip was completely worn off on one side, and in the middle the paint seemed to have been specially scraped off. Holmes sat with his back to me, and I thought that my manipulations went unnoticed.
Well, Watson, what is your opinion of her?
How do you know what I'm doing? Would you think you have eyes in the back of your head? - I said.
“What is not there is not there,” he answered.
? How could Sherlock Holmes see what Dr. Watson is doing? (Holmes watched the image of Watson in the silver coffee pot.)
Grade 11.
1. “I myself have used this cane many times,” Sherlock Holmes said after a short silence. - This is a unique tool for detecting treasures. One day I was invited by a banker to explore the underground premises he owned. I followed him slowly, leaning on my cane; I lowered it loudly so that he could hear that I was not falling behind. Having passed a series of corridors, staircases, and rooms separated from each other by massive iron doors, we found ourselves in a vast basement, which was extremely difficult to penetrate.
“Everything is clear, it’s time for us to return,” I told the banker. - I can tell you exactly where the cache is located. Invite the police and I'll open it.
? How could Sherlock Holmes determine the location of the hiding place? (Tapping with his cane, Sherlock Holmes noticed that in one place on his path with the banker, the reflected sound was the same as it happens when there is emptiness inside the body).
2. - Well, my dear, how do you like the treasures of my box? - asked Sherlock Holmes, smiling.
“Curious things,” I confirmed.
Here is another thick-walled metal cylindrical glass with a screw-on lid. I poured water into this glass, threw tin into it and melted it.
Frankly, I don't understand you. I don't think this is feasible.
Believe it or not, friend Watson.
? Is it possible to melt tin in water? (it is possible, because the boiling point of water depends on the pressure: the higher it is, the higher the boiling point. The glass that Sherlock Holmes had apparently withstood a very high pressure - sufficient for water to boil at the melting point of tin.
6. Captains' duel.
For each correct answer - 2 points.
a) “Physical terms”
1. By adding (removing) a letter in a word, make up a new one, for example:
seagulls + n = teapot
block + a = (bulb) mark + e = (chamber) paw + m = (lamp)
body - o = (sound) diamond + p = (plasma) Alice - a = (force)
row + o = (kernel) dinar + a = (radian)
2. By replacing the letter in the word and rearranging the letters, you get physical.
term: boa constrictor (u o) = water
nigeria (and e) = energy curl (o y) = pendant
sailor (a e) = thermos acorn (e o) = joule
cation (n p) = optics lapta (t m) = lamp
7. Fourth wheel
1. (cross out the extra word - 4 points.)
1. voltmeter, pressure gauge, ammeter, ohmmeter
2. Newton, Popov, Darwin, Galileo
3. liter, second, meter, kilogram
4. alpha, igrek, omega, delta
5. nano, micro, milli, mega
6. meter , elbow, fathom, span
2. Match the appropriate word from the right column to the word from the left column to get a stable phrase.
Impact... 1. Hole
Critical... 2. Point
Ionic... 3. Permeability
Black... 4. Arc
Specific… 5. Temperature
Material... 6. Surface
Magnetic... 7. Turbine
Electrical... 8. Heat capacity
Steam... 9. Wave
10. Free... 10. Communication
1-9, 2-5, 3-10, 4-1, 5-8, 6-2, 7-3, 8-4, 9-7, 10-6.
8. Physics and biology quiz.
(questions in which a biological situation is described, but it must be explained from the point of view of physics).
Grade 10.
1. Caught fish, put into a container with a capacity of 200 liters. a special vessel, adapted for preserving live fish, did not feel very good there, but when 40 liters were added to the tank. spring water, fish
came to life. What does this fact indicate?
? What physical phenomenon helped the fish?
(fish are sensitive to odors and purity of water. Thanks to diffusion, the original water mixed with water from the spring and was enriched with oxygen, which had a beneficial effect).
2. The water strider has hairs at the ends of its legs, thanks to which the support area increases and it does not fall into the water. But if there is a stain of kerosene or oil on its way, it will sink into the water.
? Why? (The hairs on the legs of the water strider are not wetted by water and are moistened by kerosene and oil).
3. Deep-sea fish die when they rise to the surface of the water.
? What is the reason for this phenomenon?
(as the fish rises, the external pressure on it decreases, and the pressure inside
remains large; it rips apart organs).
4. A whale stranded usually dies.
? What is the reason for his death in such a situation?
(when a whale is aground, a very small Archimedean force acts on it, so it needs enormous efforts to move its carcass; in addition, it is pressed into the ground and crushed by its own gravity).
5. Before the rain, shore swallows fly low over the water, and small midges, huddled in groups, are located near the water itself.
? Explain this fact. (midges concentrate near the water because they cannot rise due to the fact that before the rain the air becomes humid, and their wet wings become heavy. Swallows feed on these midges, which is why they fly low over the water).
Grade 11.
1. A wheelless car has been created that moves by jumping; such a car does not need a road.
? The principle of movement of which animal was copied by the creators of this machine? What do you know about the prototype?
(Kangaroo. Moves in jumps up to 3 m high and up to 10 m long.)
2. In preparation for the autumn migration, birds accumulate fat reserves.
? For what? (fat is a source of biological fuel that birds need for flight: its combustion provides energy that drives the wings. The fat layer slows down heat exchange with the environment and preserves
body heat for the bird).
3. In order to protect the nest of bees that settled in the hollow of a forest tree from being destroyed by a bear, they decided to hang a heavy log near the oak tree.
? How should it be hung and why will it protect the nest?
How does the installation work? (Hang the log vertically above the hollow so that it covers the entrance and a pendulum is formed. Approaching the bees’ nest, the bear is forced to push it away. The log will begin to oscillate and
periodically hit the bear).
4. The car got stuck in a forest hole. And the flight is urgent. Apart from a rope and an axe, the driver has nothing, no help is in sight.
? How to get a car out of a pothole? (tie the car with a rope to a tree, which is then cut so that it falls in the direction opposite to the car. The rope will stretch, create a traction force and pull the car out).
5. When going on a winter hike or a long walk, experienced people wrap “foot wraps” made of newspapers between their socks.
? For what purpose are they doing this? (paper and air between its layers serve as a heat-insulating material that helps preserve the warmth of the limb).
Game for fans.
Device for measuring atm. pressure (barometer)
Body trajectory length (path)
Pressure unit (pascal)
The word that Archimedes exclaimed when he made an important discovery. (Eureka!)
Speed of light value (300000 km/s)
Name of vessels connected to each other (communicating)
The smallest particle of matter (molecule)
Something without which there are no measuring instruments (scale)
Summing up the game. Team awards.
