Physics short story (1): I told such a story to my students when I was studying the sound propagation in the sound phenomenon.

Two old ladies are flying for the first time. I heard that the speed of an airplane is faster than the speed of sound. They found the captain and said seriously, "Captain, please don't fly faster than the speed of sound, because we have to talk on the plane." When I was talking about inertia, I told a story around me A beautiful lady was on the bus when the car suddenly braked. The beautiful lady was knocked down by a young man behind her.

The beautiful lady said angrily, "What virtue?" The young man smiled and said, "This is not virtue, but inertia." After listening to such a story, students will feel that physical knowledge comes from life after laughing.

Physics is interesting. Physics short story (2): Einstein as a child: [Duan Meiwen finishing. Einstein was very playful when he was a child.

His mother warned him again and again: "It can't go on like this." Einstein always replied disapprovingly, "Look at my friends, aren't they all like me?" One day, my father told Einstein an interesting thing.

Father said, "Yesterday, my neighbor Uncle Jack and I went to the southern factory to clean a big chimney. The chimney can only climb up by stepping on the steel ladder.

Your uncle Jack is in the front and I am in the back. We grabbed the handrail and finally climbed up step by step.

When you came down, your uncle Jack was still walking ahead, and I followed. When I came out of the chimney, I saw your uncle Jack, thinking that I must be as dirty as a clown, so I went to the nearby river to wash and wash.

And your uncle Jack, when he saw that I was clean when I came out of the chimney, thought he was as clean as me, so he washed his hands and went straight to the street. As a result, everyone in the street laughed so hard that they thought your uncle Jack was crazy. "

Father solemnly said to Einstein: "In fact, no one else can be your mirror, only you are your own mirror. Taking others as a mirror, * * * may make yourself a genius. "

Hearing this, Einstein suddenly felt ashamed and left the naughty children. He always takes himself as a mirror to examine and reflect on himself, and finally reflects the brilliance of his life.

Physics story (3): the legendary good name Joule, the famous British scientist Joule, loved physics very much since he was a child. He often does some experiments about electricity and heat by himself. One holiday, Joule and his brother traveled to the suburbs together.

Joule, who is clever and studious, never forgets to do his physics experiments even when he is playing. The girl with sad personality signature is indifferent. He found a lame horse, led by his brother, hiding behind him quietly. He used a voltaic battery to connect the horse with current, trying to see how the animals would react to the current.

As a result, the reaction he wanted to see appeared. The horse jumped wildly after being shocked and almost kicked its younger brother. Although the danger has appeared, it has not affected the mood of little Joule who loves to do experiments.

He rowed with giggle to the lake surrounded by mountains, where Joule wanted to try the echo. They filled the musket with gunpowder and then pulled the trigger.

Who knows "bang", a long flame spouted from the muzzle and burned Joule's eyebrows, almost scaring my brother into the lake. At this time, the sky was covered with thick clouds, lightning and thunder. Joule, who just wanted to go ashore for shelter from the rain, found that it would take a long time to hear the roaring thunder after every lightning. What happened? Joule didn't take shelter from the rain, dragging his brother up a hill and carefully recording the interval between lightning and thunder with his pocket watch.

After school started, Joule almost wanted to tell the teacher all the experiments he had done and ask for advice from the teacher. The teacher smiled at Joule, who was eager to learn and curious, and patiently explained to him: "The speed and harmony of light are different. The speed of light is fast and the speed of sound is slow, so people always want to see lightning before hearing thunder, but in fact lightning and thunder happen at the same time. "

Joule suddenly realized. Since then, he has been more fascinated by learning scientific knowledge.

Through continuous study and careful observation and calculation, he finally discovered the mechanical equivalence of heat and the law of conservation of energy, and became an excellent scientist. Joule has been engaged in experimental research all his life and made outstanding contributions in electromagnetism, heat and gas molecular dynamics theory. He became a physicist through self-study.

Physics Story (4): Speaking of electricity, the teacher asked the students, "Do you know what resistance is and what power supply is?" The student replied: "The shopkeeper (resistor) is the owner of the store, and the clerk (power supply) is the buddy of the store." When Newton was young, he once led a cow up the mountain and read a book at the same time. When he got home, he found only one rope in his hand. Cooking eggs regularly while reading will cause the watch and eggs to boil together in the pot; Once, he invited a friend to dinner at home, but he worked in the laboratory and forgot to eat or sleep. Repeatedly urged, he still didn't come out. When a friend finished eating a chicken and there was a pile of bones left on the plate, Newton remembered, but after seeing the bones on the plate, he suddenly said, "I thought I didn't eat, so I have already eaten."

Students will feel very simple, and their nervousness will be relieved soon, and then they will devote themselves to the next link of teaching. Physics Story (5): Faraday Faraday179/KLOC-0 was born in a blacksmith's family in Newington, Surrey on September 22nd.

13 years old, working as an apprentice in a bookstore, delivering newspapers and binding books. He has a strong thirst for knowledge and tries to greedily read all the books and materials he has bound from the beginning.

After reading it, I copied down the illustrations and made my reading notes neatly. Using some simple instruments to do experiments according to books, and carefully observing and analyzing the experimental results, I turned my attic into a small laboratory. After eight years in this bookstore, he forgot all about eating and sleeping and studied hungrily.

He later recalled this life and said, "I began to look for my philosophy from these books after work." These two books are helpful to my character. One is the Encyclopedia Britannica, from which I first got the concept of electricity. The other is Mrs. Macy's chemistry dialogue, which gave me the scientific basis for this course. "

Faraday is mainly engaged in the research of electricity, magnetism, magneto-optic and electrochemistry, and has made a series of important discoveries in these fields. 1820 Australian dollars.

2. How to learn physics composition 100 well

Learning physics pays great attention to the process, a process of cognition, understanding and application.

1. Cognition: Use things or phenomena around you or even some examples described by the teacher to help you fully understand it and get interested in it.

2. Understanding: memorizing formulas, theorems, experiments, etc. In an understanding way. You can use clever methods such as thinking in images to understand and remember. For example, what is a vacuum can be understood as follows: the vacuum is really empty and there is nothing left.

3. Application: one is to cope with exams, and the other is to explain some physical phenomena around you.

So when studying, don't be afraid at first, because the experience you didn't learn well before may give you some hints and may lead to a vicious circle. Try to tell yourself, "I can do it! ! ! "In fact, psychological suggestion is very useful! However, in order to increase your confidence, you'd better prepare well and know what you are doing.

Secondly, in class, we should follow the teacher's thinking closely, take some notes appropriately, and remember some knowledge points that are not clearly stated or even omitted in the book and are easy to make mistakes. Take more time to practice after class, and don't shirk it for any reason, thus giving up the best period of practice, which will only lead to tragedy in the end.

Last but not least, sum it up in time. For example, the last exam is curly, and although it has been carefully revised, we still have to think about why it is wrong. How is the correct answer worked out? Will it be wrong to take it next time? Wait a minute.

I think we can learn physics well through these learning methods.

3. Physical phenomena in life essay 100

1, quartz clock hanging on the wall, when the battery runs out and stops, its second hand often stops at the position of "9" on the dial. This is because the second hand is most hindered by the large torque at the "9" position.

2. Sometimes, when tap water flows from the adjacent faucet, it occasionally makes bursts of noise. This is because the water pipe vibrates when the water rushes out of the tap.

3. When taking pictures in front of the TV screen, turn off the camera flash and indoor lighting to make the pictures clearer. Because the reflected light of the flash lamp and the illuminating lamp on the TV screen will interfere with the transmitted light of the TV picture.

At the same temperature, frozen pork thaws faster in water than in air. At the same temperature, hot nails cool faster in water than in air. A cup filled with boiling water cools faster when immersed in water than when immersed in air at the same temperature. All these phenomena show that water has better heat transfer performance than air,

When the pot is filled with cold water, the water droplets attached to the outer surface of the pot bottom can only be dried on the flame for a long time, and then they will boil. This is because the water droplets, the pot and the water in the pot keep heat conduction, and the temperature is similar. As long as the water in the pot is not boiled, the water droplets will not boil, but will evaporate on the flame and gradually dry up.

6. Distorted mirror, the farther people are from the mirror, the more distorted they are. Because the image in the mirror is formed by the reflection of the silver-plated surface behind the mirror, uneven silver-plated surface or uneven glass thickness will lead to aliasing. The farther away from the deformed mirror, the more the reflected light on the silver-plated surface deviates from the normal position according to the principle of light amplification, and the more deformed the mirror is.

7. There are several small holes communicating with the outside world on the side of the gas nozzle of the natural gas furnace, but natural gas will not be ejected from the side holes, but only from the nozzle. This is because the air velocity at the nozzle is high, and according to the principle of fluid mechanics, the air surface pressure is lower than the atmospheric pressure outside the side hole, so the natural gas will not be ejected from the side hole of the nozzle.

8. After blowing the balloon, hold the mouthpiece with your hand and then suddenly release it. The air in the balloon is ejected and the balloon moves due to recoil. You can see that the route of balloon movement is tortuous. There are two reasons: first, the thickness and tension of the inflated balloon are uneven everywhere, which makes the balloon contract unevenly and swing around when it is deflated, thus the movement direction changes constantly; Second, the shape of the balloon is constantly changing during the contraction, so the air velocity on the surface of the balloon is also constantly changing during the movement. According to the principle of fluid mechanics, the air pressure on the surface of the balloon is constantly changing, so the balloon swings and the direction of movement is also constantly changing.

9. When the ceiling fan rotates normally, the tension at the suspension point is smaller than when it does not rotate. The greater the rotational speed, the more the tension decreases. This is because when the ceiling fan rotates, the air has an upward reaction force on the ceiling fan blades. The greater the speed, the greater the reaction.

10, electric furnace "combustion" is the conversion of electric energy into internal energy. Without oxygen, it can only oxidize electric furnace wires, shortening service life.

1 1. Even if there is no wind, the path of paper dropping is tortuous. This is because each part of the paper has different convexity and concavity and shape, so in the process of falling, the air speed on its surface is different. According to the principle of fluid mechanics, there is uneven air force everywhere on the paper, which changes with the movement of the paper, so the paper keeps rolling and falling zigzag.

4. How to learn the physics composition of 100 words?

The three basic concepts should be clear about the basic laws, be familiar with the basics, practice physics courses, and summarize some concise and memorable practical inferences or judgments to help solve problems. Physics should be independent (referring to dependence), ensure quality and quantity, do some problems independently, solve problems slowly, take fewer detours and take the road to success. Physics class should be clear and clear, and the hidden dangers of solving problems should be clear in physics class. Draw as many pictures as possible to change abstract thinking, think in images more accurately, do state analysis, state analysis. Fixed, dead and intermittent state analysis, continuous class should be listened carefully, distracted notebook class should be listened to the main notebook, some things should be remembered, knowledge structure should be solved, examples should be understood too well, and so on. And the class should be recorded, and the notes should be sorted and digested on the other side to supplement the learning materials. Learning materials should be kept, homework should be marked, and learning materials should include exercises and papers. Experimental reports and so on are very precious, so we should pay attention to filling and utilizing the room, using non-superb art, using the room, learning from others' strengths, learning from others' strengths, learning from others' strengths, communicating with others, learning from others' strengths and improving each other. We must pay attention to the knowledge structure, and master the knowledge structure systematically, and the knowledge system can be fragmented. The knowledge structure, even the specific knowledge structure, depends on the number of physical calculations. How many powerful tools are used to ensure vigorous energy and high efficiency is too important.

5. How to learn physics composition well 100.

The three basic concepts should be clear, the basic laws should be familiar, and the basic methods should be skilled. In the process of learning physics, it is very useful to summarize some concise and practical inferences or conclusions for solving problems and learning physics well.

Do the problems independently, and do some problems independently with good quality and quantity (meaning not relying on others). Solving problems independently may sometimes be slower and sometimes detours, but this is the only way to success.

The physical process should be clear about the physical process. If the physical process is not clear, there must be hidden problems in solving problems. No matter how difficult the topic is, try to draw pictures. Drawing can turn abstract thinking into image thinking and master physical process more accurately. With this diagram, we can make state analysis and dynamic analysis. State analysis is fixed, dead and discontinuous, while dynamic analysis is alive and continuous.

Listen carefully in class and don't be distracted.

Notebook class is mainly about listening to lectures. You should have a notebook and write down some things. Knowledge structure, good problem-solving methods, good examples, places you don't understand, etc. Should be recorded. After class, you should organize your notes. On the one hand, you should "digest" and on the other hand, you should supplement your notes.

Learning materials Learning materials should be well preserved, classified and marked. The classification of learning materials includes exercises, papers, experimental reports and so on.

Time is precious. Without time, there is no time to do anything, so we should pay attention to making full use of time, which is a very superb art.

Learn from others with an open mind, from classmates, from people around you, and see how others learn. I often have "academic" exchanges with them, teaching and learning from each other and improving together. Never be self-righteous.

Knowledge structure should attach importance to knowledge structure, master it systematically, and systematize scattered knowledge. From the whole knowledge structure of physics to the knowledge structure of mechanics, even to chapters, such as the knowledge structure of statics and so on.

The calculation of mathematical physics depends on mathematics, which is too important for learning physics. To learn mathematics well, we must make good use of this powerful tool.

Physical activity Healthy body is the guarantee of good study, and vigorous energy is the guarantee of efficient study.

6. Ask a few short physics stories, 100~200 words.

Legend has it that in 1590, Galileo, who was only 26 years old, conducted a falling experiment on the leaning tower of Pisa. He specially invited some university professors to watch, and many people came to watch when they heard the news.

I saw Galileo with two iron balls, one weighing 45.4 kg (100 lb) and the other weighing 0.454 kg (1 lb). He climbed to the top of the tower like a soldier going out to war. When he announced to people that two iron balls, one big and one small, would fall and land at the same time, people under the tower talked about it: "Is Aristotle really wrong?" This is absolutely impossible! ""This guy must be crazy! " ……

Galileo was calm when he heard these comments and ridicule. He said confidently and loudly, "Gentlemen, don't jump to conclusions, let the facts speak for themselves!" After that, he held out his hands and let the two iron balls fall from the tower at the same time. They fell parallel and faster. Finally, with a bang, they landed at the same time. In the face of irrefutable experimental facts, those loyal followers of Aristotle were dumbfounded and at a loss, so they had to walk away despondently. The Leaning Tower of Pisa experiment not only overthrew the wrong theory of ancient authorities, ended its nearly two thousand-year rule in academic circles, but also initiated a new era of modern scientific experiments.

7. Physics knowledge essay

On the first floor, don't always copy and paste. The following is the original.

Physics is closely related to life. You can think about it. The following one:

It is hot in summer, so drinking beer has become a way to quench people's thirst, especially cold beer. When we take the beer out of the refrigerator, we will see many small water droplets on the wall of the beer bottle. Because the temperature of the bottle just taken out is much lower than that outside, the water vapor in the air liquefies on the outer surface of the bottle and then forms small water droplets.

When we picked it up with our hands, we felt a little unstable and slippery. Compared with a dry beer bottle, it seems to fall more easily. That's because there is a layer of water between our hands and the bottle, the friction coefficient is reduced, the maximum static friction is also reduced, and the gravity is unchanged. Therefore, to increase the pressure, that is, to grasp more tightly, so as not to slip from your hands.

The next step is to open the bottle cap with a wedge. If we use our hands, we can't do it People with good teeth will choose to use their teeth directly, but more people choose to pry them open with a wedge. With the wedge, we only need a little force to pry it open That's using Archimedes' lever principle. The arm of our hand is longer, so it is more labor-saving.

Such physical phenomena can be seen everywhere in life. I won't go into details here. Leave it to everyone to discover slowly. Experience physics and experience life.

8. There is an urgent need for a short essay about physics of about 100 words.

Fog and clouds are formed by condensation of water vapor, but the bottom of the cloud does not touch the ground, while fog touches the ground.

Therefore, it can be said that fog is a cloud on the ground. When you climb Huangshan, Lushan and Taishan, you may have such an experience: sometimes from the foot of the mountain, white clouds surround the mountains and mountains are hidden among them. When you climb to the top of the mountain, the mountains are clearly visible, but the white clouds are under our feet, and people are like in the fog.

According to different horizontal visibility, fog can be divided into heavy fog, dense fog, dense fog, medium fog and light fog. The horizontal visual distance of fog is less than 50 meters; The horizontal visual distance of dense fog is between 50 and 200 meters; The horizontal visual distance of fog is between 500 ~ 1000m, and the visual distance of light fog is above 1000m.

According to different causes, fog can be divided into radiation fog, advection fog fog, steam fog, uphill fog and frontal fog fog. Radiation fog is formed after the ground air is cooled by radiation at night and reaches the supersaturated state of water vapor.

This kind of fog often appears in sunny nights and mornings when the wind is blowing gently and the water vapor near the ground is sufficient. The appearance of radiation fog generally indicates that the weather will be fine that day, so there is a saying of "ten fogs and nine sunny days".

Advection fog is caused by horizontal airflow. When warm and humid air flows through the cold ground or sea surface, the lower layer of air cools due to contact with the ground or sea surface, so that water vapor condenses into fog.

The appearance of advection fog usually indicates that it will rain in two or three days. Frontal fog originated from the confrontation between cold and warm air masses.

This kind of frontal fog often appears in rainy season in China, and it is also a sign of rainy weather. The foggy place in China is Mount Emei in Sichuan.

During 1953~ 1970, the average number of foggy days reached 323. It was foggy almost every day for four days.

Fog has a great influence on navigation, aviation and crops. For example, once the sea navigation encounters dense fog, the ship may lose its way, even hit the rocks, run aground, collide and other accidents; It is difficult for an airplane to take off or land in foggy weather; In foggy and cold weather, the yield and quality of crops will be affected.

9. Short essay on urgent ~ ~ ~ scientific knowledge (100 words or less)

There are many kinds of scientific knowledge. What do you want? Such as biology, physics, chemistry and so on.

Provide some topics of scientific papers for reference. What are the types of scientific papers on weather modification? How to write a scientific paper? Why can clothes keep people warm? Electromagnetic runway color projection small magnetic needle student scientific papers model essay to be an innovative person. Don't waste rubbish. Why are shoes getting brighter and brighter? What can we do for bioenergy? Are twins really telepathic? Why do popsicles steam? How to write scientific papers according to the new theory of dark matter? Be an innovative person. Science and technology club and I can fly without opening the door, and we can see the door. Can outsiders add vinegar to the water when cleaning umbrellas and raising flowers? The invention of intelligent ground garbage collection device-the wonderful use of folding scale ash. Why didn't the Great Wall fall down for thousands of years? By studying the foraging habits of spiders, the vitality of mantis plants will also sleep. On the relationship between buoyancy and gravity when objects float, what harm does duck's magical saliva have to the experiment of oil smoke in ink kitchen?

10. Physics paper

If gravity disappears,

One day in 2 108, there was a sudden loud noise over the earth. After a minute of darkness, people found that we could fly. Not only humans, but also cars and street lamps can fly. Everything that should be on the surface of the earth is flying all over the sky. At this time, people suddenly realized that the earth had lost its gravity.

I flew home, and everything at home floated in the air. I want to drink water. As soon as it is poured out, it will be scattered in all directions. I want to sleep. I don't know where it drifted when I was lying in bed. The more I struggle, the more trouble I have. I even hit the wall. Want to play computer, holding the mouse only to find that the host has long abandoned us; I want to invite my friends to play together, but everyone can't find their shadow. It seems that they don't know where to fly.

I came to the gym in a daze, and the basketball stand was floating overhead. I picked up a basketball and jumped up gently. Haha, I can dunk! So I learned the movements of the NBA's buttoners and presented a wonderful performance for everyone. Turn around 360 degrees in the air, turn around in the air relay and accelerate the attack and ride ... I think these actions will make me perform in the NBA dunk contest, and I will definitely become "Potato III".

The journey home is really not peaceful, and you may be injured by objects floating in the air everywhere. Hungry and tired, I don't know if I can eat the food in my mouth tonight. I don't know if I can sleep in the bed. I struggled to float home, but it was difficult to land at home. I'm exhausted, scratching around in the air. The joy of dunking just now is long gone.

It seems that life without gravity is really hard!

The imagination of new machinery and the development of human beings promote the development of machinery. As early as ancient times, Archimedes had made many machines for Syracuse to resist the invasion of Rome. Indeed, the role of machinery in human beings is unparalleled, and human life cannot be separated from machinery. Simple machinery-pulley can play a labor-saving role and is used in life and production.

The invention of the steam engine marked the beginning of the first scientific and technological revolution, and the gross domestic product of mankind was constantly refreshed. The invention of the generator marks the beginning of the second scientific and technological revolution, and the widespread use of electricity has brought mankind into a new era. The invention of electronic computer marks the beginning of the third scientific and technological revolution, and the use of electronic computer has brought mankind into the information age. With these scientific and technological revolutions, human development has advanced by leaps and bounds, and unprecedented machines have appeared one after another. The ever-increasing population and the deterioration of the earth's environment urge mankind to look to the universe and find a new home. The Soviet Union launched the first man-made satellite into space, and the Americans landed on the moon for the first time ... This alone does not mean that mankind has moved towards this boundless universe. At present, human spacecraft can't fly out of the solar system at most. Sadly, all kinds of astronomical data show that there is no planet in the solar system that can be used as a new home for mankind. Even though the spacecraft can take us out of the solar system, the speed limit has made us old enough to get out of the Milky Way. It can be seen that the beginning of the fourth scientific and technological revolution is marked by the invention of a new machine, the light speed engine, and it also truly marks the March of mankind into the universe. With the light speed engine, it is only a short journey from the earth to the moon, to Mars, to Pluto and even to the Milky Way. It is conceivable that the light speed engine can quickly take humans to various planets. We set up relay stations on various planets, and space roaming has become a common occurrence ... I believe that after several years of exploration, we will definitely find the first and second ... the nth earth in mystery of the universe.

Due to too many limitations of human beings, it is impossible to completely take human beings to the universe by the light speed engine alone. Human life is inseparable from oxygen and fresh water ... Imagine how much oxygen and fresh water are needed to maintain a planetary transit station during the space roaming. The earth is already short of water resources. How many natural resources do you need to make oxygen artificially? It takes 4.8 years for the speed of light to reach the nearest proxima centauri. Humans have to go further. How can the life span of 70-80 years be satisfied? Raising the human limit is another important condition for entering the universe, which is the task of the fifth scientific and technological revolution-inventing the mechanical human body. As long as human beings bring their "soul" into a lasting body, then people can run faster and fly higher without eating, drinking or taking oxygen ... They have thousands of years of life and strong muscles. ...

With these two, I believe that this huge universe can also be conquered by human beings.

As mankind enters a new era, the imagination of all kinds of new machines will be endless. May machinery always benefit mankind.