To use the preview of presentations, create a Google account (account) and sign in: https://accounts.google.com
Slides captions:
CLASS! physics for the curious
PHYSICS! What a capacity of words! PHYSICS! It's not just sound for us! PHYSICS is the support and foundation, of all sciences without exception! (words of a student song)
An ancient Greek scientist who discovered the equilibrium condition for a lever An Italian scientist who discovered the law of inertia An ancient Greek philosopher and scientist, studied at the Plato Academy in Athens, was the tutor of his son Alexander (the future commander) with King Philip of Macedonia, founded his own school in Athens - the Peripatetics, in his treatises outlined his concepts of nature and movement. Name the scientist Archimedes Aristotle. Galileo 1. 2. 3.
"Find the excess" Physical phenomenon: boiling water snowing electric spark force Physical body: icicle water drop piece of ice. Physical quantity: mass force power wind Substance: rubber plastic ball plasticine TRUE NOT TRUE NOT TRUE TRUE NOT TRUE NOT TRUE INCORRECT INCORRECT NOT TRUE NOT TRUE NOT TRUE NOT TRUE TRUE TRUE
A device for measuring force A device for measuring pressure greater and less than atmospheric A device for measuring the density of a liquid DYNAMOMETER MANOMETER AREOMETER
What does physics study? 5 10 15 20 Physical quantities 10 15 20 Observations and experiments 10 20
English The language from which the word “PHYSICS” came to us Latin German Greek TRUE FALSE FALSE FALSE
NOT TRUE NOT TRUE TRUE NOT TRUE Which scientist introduced the word "physics" in Russia 2. LOMONOSOV 3. MENDELEEV 4. EINSTEIN 1. ARISTOTLE
NOT TRUE TRUE NOT TRUE NOT TRUE Which of the following phenomena is not mechanical? WATER FLOW THROUGH PIPES EARTH ROTATION AROUND ITS AXIS WATER BOILING AIRCRAFT MOVEMENT 1 3 2 4
Thermal phenomena include the Glow of the Sun The reflection of light from mirrors The melting of ice The influence of the Earth on the compass needle NOT TRUE INCORRECT INCORRECT CORRECT
The basic unit of length in SI is: ARSHINE KILOMETER METER MILES INCORRECT INCORRECT INCORRECT
The basic unit of mass in SI is: GRAM POUND KILOGRAM TONNA INCORRECT INCORRECT INCORRECT CORRECT
The basic unit of time in SI is: HOUR OF DAY SECOND LIGHT YEAR INCORRECT INCORRECT INCORRECT CORRECT
How can observation and experience be summed up in one word? CONTEMPLATION LEARNING PROOF RESEARCH NOT TRUE INCORRECT INCORRECT TRUE
Line up a logical chain of events, as a result of which knowledge is born HYPOTHESIS EXPERIMENT OBSERVATION CONCLUSION
TROUBLES FROM A BARREL
KEROSENE, BECAUSE THE DENSITY IS MORE THAN A WATERLINE DEPOSIT AIR IS NOT A ONE, PEAS DO NOT GO TO FREEZE IT How can water be carried in a sieve? How many peas can fit into a 0.2 liter glass? Passes through the nose, chest And the reverse keeps the path. He is invisible, and yet we cannot live without him. The depth to which the ship sinks. Two identical barrels are filled with gasoline and kerosene. Which fuel has more mass? Red line on board the ship 1 2 3 4 5 6 Select question #
“AND WE WAS THIS…” 10 15 20 25 5 30 35 40
In what situation is a person in a state of weightlessness? BEING IN THE BASKET OF A FLYING BALLOON HANGING, GRABING A CHANDELIER UNDER THE CEILING JUMPING WHEN SWIMMING UNDER WATER CORRECT
Who has been awarded the Nobel Prize twice? PIERRE CURIE MARIE SKLODOWSKA-CURIE IRENEN JOLIOT-CURIE FREDERIC JOLIOT-CURIE VERNAULT
When inflated soap bubble it is dyed in different colors. What phenomenon is observed? DIFFRACTION DISPERSION POLARIZATION INTERFERENCE TRUE
They say about smart people - "seven spans in the forehead." So what physicist is smarter if the width of his forehead is...
What particles were discovered first? QUARKS ELECTRONS NEUTRONS NEUTRINO CORRECT
You opened the refrigerator door. What will happen to the temperature in the room? NOTHING WILL DOWN FIRST WILL DECREASE, THEN WILL INCREASE WILL RAISE CORRECTLY
If you drop a piece of sugar into a glass of water and dissolve it, can a piece of sugar again turn out in the glass? YES IF HEATING SWEET SOLUTION YES IF COOLING SWEET SOLUTION YES IF HEATING QUICKLY THEN COOLING NEVER GOES CORRECT
This special item will instantly tell you the answer, Take your umbrella or not. Q: What's in the black box? BAROMETER
Physics in riddles
From a hot well Water pours through the nose MECHANICS It goes, goes, and reaches the shore - then it disappears In a round house, in a window Sisters walk along the path The younger one does not hurry, But the older one hurries Without arms, without legs Prowls through the field, sings and whistles, Breaks trees, bends grass to the ground Two sisters swayed, they sought the truth, and when they did it, the wave of the clock hands stopped the wind scales the kettle
THERMAL PHENOMENA Curls around the nose, But it is not given into the hands. What is not visible in the hut? It warms in the winter, Smolders in the spring, Dies in the summer, Comes to life in the autumn Pure and clear, like a diamond, There is no road, He was born from his mother, He himself gives birth to her There is a commotion in the yard: Peas are falling from the sky. Ate six peas Nina, She now has a sore throat SMELL OF HEAT SNOW ICE HAIL
Electrodynamics A fire arrow flies, no one will catch it: neither the king, nor the queen, nor the red maiden The heavenly horse gallops, fire pours from under the feet Without wings, without a body, flew a thousand miles along the paths I run, Without paths I can't. Where am I, the guys are not, The light in the house will not light up The house is a glass bubble. And the light lives in it! During the day he sleeps, but when he wakes up, he will light up with a bright flame. lightning thunder and lightning radio wave electric current light bulb
Optics When he comes into the house - you can’t drive him out with a stake, When he comes - he leaves by himself The white cat climbs through the window I don’t have heat, fire, or ashes, And I burn a lot Lies on the ground: neither paint over, nor scrape off, nor fill up. What's this? There are no eyes of his own, but he sees far away a ray of light, a sunbeam, a lens, a shadow, binoculars.
http://class-fizika.narod.ru/vic.htm http://www.profistart.ru/ps/blog/30715.html http://festival.1september.ru/articles/537208/ http:// portfolio.1september.ru/work.php?id=562261 http://www.openclass.ru/node/235673
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 wire does not die from electric shock, and a person who has fallen into quicksand cannot drown in them. You will find out whether there really are no two identical snowflakes in nature and whether Einstein was a loser at school.
10 fun facts from the world of physics
Now we will answer the questions that concern many people.
Why does a train driver back up before moving off?
The reason for this is the static friction force, under the influence of which the train cars are standing still. If the locomotive simply moves forward, it may not move the train. Therefore, he slightly pushes them back, reducing the static friction force to zero, and then gives them acceleration, but in the other direction.
Are there identical snowflakes?
Most sources claim that in nature there are no identical snowflakes, since several factors influence their formation at once: humidity and air temperature, as well as the snow flight path. However, entertaining physics says: you can create two snowflakes of the same configuration.
This was experimentally confirmed by the researcher Karl Liebbrecht. Having created absolutely identical conditions in the laboratory, he obtained two superficially identical snow crystals. True, it should be noted that their crystal lattice was still different.
Where is the largest reservoir of water in the solar system?
Never guess! The most voluminous storage of water resources in our system is the Sun. The water is in the form of steam. Its highest concentration is noted in places that we call "spots on the Sun." Scientists even calculated that in these regions the temperature is one and a half thousand degrees lower than in the rest of our hot star.
What invention of Pythagoras was created to combat alcoholism?
According to legend, Pythagoras, in order to limit the use of wine, made a mug that could be filled with an intoxicating drink only up to a certain mark. It was worth exceeding the norm even by a drop, and 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, “relieving” the container of all contents in the case when the liquid level is above the channel bend.
Is it possible to turn water from a conductor into an insulator?
Entertaining physics says: you can. 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 in a falling elevator?
Many people think: you need to jump at the moment the cabin hits the ground. However, this opinion is incorrect, since it is impossible to predict when a landing will occur. Therefore, entertaining physics gives another advice: lie on your back on the floor of the elevator, trying to maximize the area of \u200b\u200bcontact with it. In this case, the impact force will not be directed to one part of the body, but will be evenly distributed over the entire surface - this will significantly increase your chances of survival.
Why does a bird sitting on a high voltage wire not die from electric shock?
The bodies of birds do not conduct electricity well. By touching the wire with its paws, the bird creates parallel connection, but since it is not the best conductor, charged particles do not move through it, but along the cable cores. But as soon as the bird comes into contact with a grounded object, it will die.
The mountains are closer to the source of heat than the plains, but on their peaks it is much colder. Why?
This phenomenon has a very simple explanation. The transparent atmosphere freely passes the sun's rays without absorbing their energy. But the soil perfectly absorbs heat. It is from it that the air then warms up. Moreover, the higher its density, the better it holds received from the ground thermal energy. But high in the mountains, the atmosphere becomes rarefied, and therefore less heat “lingers” in it.
Can quicksand suck?
In films, there are often scenes where people "drown" in quicksand. AT real life- says entertaining physics - this is impossible. You won’t be able to get out of the sandy swamp on your own, because in order to pull out only one leg, you will have to make as much effort as it takes to get up passenger car average weight. But you also cannot drown, because you are dealing with a non-Newtonian fluid.
Rescuers advise in such cases not to make sudden movements, lie with your back down, spread your arms to the sides and wait for help.
Does nothing exist in nature, see the video:
Amazing cases from the life of famous physicists
Outstanding scientists, for the most part, are fanatics of their field, capable of anything for the sake of science. So, 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, carved ivory probe into the eye, simultaneously pressing on the back of the eyeball. As a result, the scientist saw rainbow circles in front of him and proved in this way: the world we see is nothing but the result of light pressure on the retina.
Russian physicist Vasily Petrov, who lived at the beginning of the 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 could measure the strength and power of the current, and the scientist had to do it by touch.
The reporter asked A. Einstein if he writes down his great thoughts, and if he does, then where - in a notebook, notebook or special file. Einstein looked at the reporter's bulky notepad and said, "My dear! Real thoughts come so rarely to the head that it is not difficult to remember them.
But the Frenchman Jean-Antoine Nollet preferred to experiment on others. Conducting an experiment in the middle of the 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, well, oh, very quickly.
Almost every student knows the story that the great Einstein was a loser in his childhood. However, in fact, Albert studied very well, and his knowledge of mathematics was much deeper than 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 shortage. On this basis, he was denied admission. The following year, Albert showed excellent results in all subjects, and at the age of 17 he became a student.
Take it, tell your friends!
Read also on our website:
show more
extracurricular activity for middle management. Two teams can play according to the principle of the game "Own game". The team chooses a category and answers the question.
View document content
"Cool Physics"
Photo identification
puzzles
Physicists-lyricists
A lot of words
… and experience is the son of difficult mistakes...
What unites them?
Entertaining puzzles
I believe - I do not believe
- Einstein, 2. Galileo, 3. Newton, 4. Copernicus,
5. Archimedes, 6. Tsialkovsky
Degree. Energy. An experience. Strength. Current. Weight. Vacuum. Engine.
"PHYSICS-LYRICS"
Compose a little quatrain
one of the suggested pictures. Explain the physical phenomenon.
EXERCISE
The team captain must explain the words
using synonyms, antonyms and essence
the word being explained, without naming its cognate words.
The rest of the students on the team should have them as soon as possible.
name and find out the main word,
which unites the guessed words
"... and experience is the son of difficult mistakes ..."
1. Remove the ball without turning the dishes over.
2. Inflate a balloon in a plastic bottle.
3. Take out the bar without touching the glass.
4. Top SOKAI
ENTERTAINING CHALLENGES
Task 1
If an intelligent, modest and tactful physicist is demanded money for two kilograms of sausage, and he sees that the scales with sausage show only one kilogram, then will the physicist shout to the whole store: “No, sorry, the weight of your sausage is not two - only one kilogram!"?
Task 2
What force of gravity acts on one kilogram of potatoes,
hanging from Uncle Petya in a string bag outside the window?
August Ferdinand Möbius - German
mathematician, theoretical astronomer,
Professor at the University of Leipzig
Observatory director.
1. Before you take a cigarette, think and think, because ...
Smokers annually "smoke", i.e. 720 tons of hydrocyanic acid, 384,000 tons of ammonia, 108,000 tons of nicotine, 600,000 tons of tar and more than 550 tons of carbon monoxide are emitted into the atmosphere.
The total mass of cigarette butts on Earth per year is 2,520,000 tons.
Tobacco smoke, enveloping the earth, delays ultraviolet rays.
On average, 25% of all types of substances contained in tobacco are burned and destroyed during smoking, 50% goes into environment, 20 enters the body of a smoker and only 5% remains in a cigarette or cigarette filter.
The total toxicity of tobacco smoke is 4.5 times higher than the toxicity of car exhaust gases. Smoking just one cigarette has the same effect on the body as being near a major highway for 16 hours.
Staying a non-smoker for 1 hour in a closed Smoke-filled room is equivalent to smoking 4 cigarettes.
The temperature of tobacco smoke is 35-40 degrees higher than the temperature of the air entering the mouth during smoking, which causes a sharp temperature drop in the mouth. While smoking one cigarette, 15-20 such changes occur, which is bad for the condition of the tooth enamel, it cracks. This is why teeth begin to decay earlier and faster in smokers than in non-smokers.
Systematic smoking causes narrowing of capillary vessels, including in the heart, which contributes to the development of coronary disease.
Smoking takes 8-10 years of a person's life1.
Studies have shown that in people who constantly inhale cigarette smoke, the cells of the mucous membrane of the bronchi and stomach undergo gross changes in their internal structure. Cells begin to decrepit, and this is one of the first changes on the way to the formation of a cancerous tumor.
Based on the findings of the World Health Organization among patients with cancer in various forms - 95% of smokers, in connection with this, the mortality rate for smokers is 20 times higher than for non-smokers2.
To make physics more accessible to children, V.I. Elkin, Honored Teacher of the Russian Federation Slobodskoy high school № 5 Kirov region offers the following unconventional approaches:
2. Physical phenomena in folk wisdom.
. "A lot of snow - a lot of bread." Why? (Snow has poor thermal conductivity, i.e. snow is a “fur coat” for the earth, it keeps it warm: frost will not get to winter crops, it will protect them from freezing)
. "The plow glistens from work." And why? (The surface of the plow during operation experiences a large force of friction against the ground, as a result, the surface is polished, polished, and becomes shiny)
. "Still water washes away the shores." Explain the physical phenomenon. (Between the individual layers of water flowing in the river, there is friction, which is called internal. In this regard, the speed of the flow of water in different parts of the cross section of the river channel is not the same. The largest in the middle of the channel, the smallest near the banks. The friction force not only slows down the water , but also acts on the shore, pulling out soil particles, and thereby washes it away)
. "Squeaks like an unoiled cart." And why? (No lubrication - friction is high, it causes vibrations on the axle of the cart, and a creaking sound appears)
. “You can’t wash the tar without lard.” Explain this proverb. (Lard has a greater surface activity than tar, it displaces the tar film from the washed surface due to the forces surface tension)
. "Frozen, as at the bottom of the sea." Why is it always cold on the seabed? (The sun's rays do not warm up the deep layers of water: thermal, infrared rays are absorbed by almost all the water surface. In addition, water has a relatively low thermal conductivity).
. "Without a lid, the samovar does not boil; without a mother, a child does not frolic." Why doesn't a samovar boil for a long time without a lid? (When the lid is open, some of the molecules with high kinetic energy will fly away from the surface of the water, taking energy with them)
. “As it comes around, it will respond.” What is the law of physics? (Newton's third law)
. "A foot rider is not a friend." What are we talking about? (About speed)
Listen to the lines of A. S. Pushkin:
Neater than fashionable parquet
The river shines, dressed in ice.
Boys joyful people
Ice skates cut through the ice.
Why do skates cut ice? (“They cut ice”, i.e. they easily glide over the ice. The blades of the skates are thin, so the pressure on the ice is high. Under pressure, the ice melts, good lubrication is formed. The coefficient of friction becomes small, applying little effort, the boys move quickly)
Listen to an excerpt from A. A. Fet's poem "Snowstorm":
Everything is silent, - a torch with a bang
Only burns with a crimson glow,
Yes, the wind blows on the roof.
Why does the torch "burn with a bang"? (Because at high humidity, wooden objects become damp. When burning, moisture from the wood evaporates intensively, increasing in volume, the steam breaks the wood fibers with a crack)
3. Riddles about natural phenomena.
Runs without legs, burns without fire. (Electricity)
As the Sun burns, it flies faster than the wind, the road lies in the air, it has no equal in strength. (Lightning)
He walks along the sea, he walks, and when he reaches the shore, he disappears there. (Sea wave)
Curls around the nose, but not in the hands. (Smell)
Without wings, without a body, she flew a thousand miles away. (Radio wave)
