Science lovers please come in, science lovers, please enter

Newton's classical mechanics can only explain macroscopic low-velocity objects, and high-speed and microscopic ones need to be explained by more advanced theories such as quantum mechanics.

What is Science? I really didn't think about it, and I couldn't say it at all (or at all), but I actually admired the questioner (in fact, it's not just the question), including the questioner's understanding. Here's what I found in the encyclopedia:

Basic Definition - Science is a person who advocates truth and truth, never-ending exploration and practice, tends to approach the truth in stages, explains and reveals the characteristics of the truth in stages, development, historicity, dialectic, universality, particularity, information, etc., does not contain a self-contradictory knowledge system as much as possible, and is a noble cause that will always benefit human society.

Science should be the content of five aspects: First, science is knowledge. Second, science is not general scattered knowledge, it is a theoretical and systematic knowledge system.

Third, science is the activity of human beings, the community of scientists, and the scientific community to understand the laws of nature, society, and human beings themselves. Fourth, in modern society, science is still an institution. Fifth, science and technology are productive forces, and science and technology are the primary productive forces.

In layman's terms, science is an attitude, an opinion, a method! At the same time, the scientific thing itself has a paradox! That is, things from different professional disciplines can easily be confused and considered contradictory! In fact, it reflects the different and complex aspects of a scientific understanding of things!

Anyone who is engaged in scientific and technological work knows very well that the establishment of concepts and hypotheses and assumptions at the beginning is very difficult! So, for the original concept of science itself, for any of the top scientists in the world, it is very difficult! So, it takes guts to give a basic definition of science!

Courage is required! It is also necessary to pay deep attention to the high realm of human destiny!

Cihai's explanation of "science".

Science is a knowledge system that uses categories, theorems, laws and other forms of thinking to reflect the essence and laws of various phenomena in the real world, and is one of the social ideologies.

According to the different research objects, it can be divided into natural science, social science and thinking science, as well as philosophy and mathematics that summarize and run through the three fields.

According to the different connections with practice, it can be divided into theoretical science, technical science, applied science, etc.

Science is the best in social practice and serves social practice. It is a revolutionary force that has played a driving role in history. In modern times, science and technology are the primary productive forces.

The development and role of science are conditioned by social conditions. Modern science is flourishing in the direction of highly differentiated and highly integrated disciplines.

It's a bit of a problem. Newton's concept of time and space is inherently flawed, it is an absolute view of time and space, and the conclusions deduced on this basis will also be very flawed.

For high-speed movements, the theory of relativity is used; For microscopic motion, quantum mechanics is used. Newtonian mechanics can only be applied in macroscopic low-speed movements.

As for what science is? It is difficult to make it clear that science is not the same as truth, and science can be falsified. That is to say, today's scientific theories may be replaced by more advanced theories tomorrow.

Science is just a way for us to see things, it doesn't exist in things, it's only in our minds, everything is just a model, you know?Hey, you don't understand!

We may be close to exploring the ultimate laws of nature.

Stephen. w.Hawking.

1.Remove the air from the bag. It's because the atmospheric pressure of the outside world is pressing them together.

2.The principle of the pressure cooker is to increase the pressure inside, and then the boiling point of the water will rise (higher than 100 degrees), so that the maximum temperature that the food inside can reach will rise, and the food will cook quickly. After you deflate, the temperature inside the pot is still above 100 degrees, and at standard atmospheric pressure, it boils.

3.The mountain is at a high altitude and the temperature is low, and the gas is in small droplets, so it looks like a cloudy cloud.

4.The specific heat of water is larger than that of land (sand and gravel), and when the sun is exposed to the sun during the day, the temperature of the land rises more and faster, and the hot air rises, and the cold air on the sea surface flows over. At night, it is exothermic, and the temperature of the land decreases faster and more.

The air flows from the land to the sea. Note: Specific heat is the amount of temperature increase (or decrease) when a certain mass substance absorbs (or releases) a certain amount of heat.

5.Carbon dioxide prevents surface heat from radiating into space and has the function of regulating the earth's air temperature. Without carbon dioxide, the Earth's average annual temperature would be 20 percent lower than it is today.

However, if the carbon dioxide content is too high, the earth will feel like it is in a pot, and the temperature will gradually rise, forming a "greenhouse effect". Gases that form the greenhouse effect, in addition to carbon dioxide, there are other gases. Among them, carbon dioxide accounts for about 75, chlorofluoroalkane accounts for about 15% 20, and there are more than 30 kinds of methane and nitric oxide.

6.Dry ice sublimates into gaseous CO2, to absorb a large amount of heat, the surrounding temperature decreases, water vapor liquefies into water droplets when cold, and a large number of water droplets gather into clouds, which falls.

7.Insulin.

In fact, nitrogen dioxide, sulfur dioxide, and carbon monoxide are all colorless, and they cannot affect visibility, while fog is the condensation of moisture on particulate matter (including inhalable particulate matter), and fog can affect visibility, not to mention that inhalable particulate matter itself can affect visibility.

A bar: The dust gets wet with water and sinks.

It's landed.

b Ever heard of photochemical smog?

Can radioactive material be? Accumulation to death? (For example, effects such as neutron bombs, killing white blood cells, and using a directional neutron source for assassination)

Microwave directed radiation will leave obvious burn marks on ** while causing death, which is too obvious.

Or binary nerve gas can also be, similar to the kind of "euthanasia", in which another "meta" can be placed on politicians.

Both of these lines of thought can cut into the theme that the author is likely to envision.

I'm also conceiving a sci-fi war **, I have time to communicate a lot, thank you)

Sci-fi yes, then I played.

When the autopsy was performed, it was found that there was a gray substance, small crystals, in the blood vessels of the deceased.

Observed under the microscope, it is a nanorobot.

Nanobots were already widely used in medicine at that time, and the deceased had a history of cerebral blood tethering before his death, and nanorobots were implanted in his body to clean up blood clots.

This technology is widely used in medicine and can completely tie the patient.

Usually the robot works hard in the blood every day to clean up waste products from the blood vessels.

But this time, the nanobots huddled together and formed a new blood tie, killing the patient.

Why do you say that?

The suspicion is on the doll, and after the inspection of the doll, it was found that the doll belongs to the smart doll.

This type of smart doll uses microwaves to perceive the world, much like bats, but the waves used are different. Microwaves are used to judge human movements and sounds (different from sound waves of anger, anger, and joy) and interact with humans.

This microwave is completely harmless to the human body, but it can interfere with the circuitry of nanorobots.

The prolonged interference causes the circuitry of the nanobot itself to shift, because the nanobot needs to be very accurate in determining which is waste, and at the same time they need to judge that the same kind is not "waste". The effect of this seemingly small shift on the nanobots is that they judge that the nanobots are also waste products in the blood, so they clean each other up, so the small mass rolls bigger and bigger, and finally forms a blood tether.

It should be noted that nanobots can be replicated in human blood.

So the World Health Organization issued a new statement, announcing that the disease was named "nano-tether".

PS: Actually, you don't mean anything to emphasize dolls. We can attribute the cause of death to the deflection of the Earth's magnetic field. As a result of the widespread use of technology, the world's population has plummeted by half.

It's a science fiction story, but it's also scientifically justified and valuable.

It is also that thing that emits a special gas, which is fine to ordinary people, but that politician is a little special, he has severe allergies, and the perfume on his body will reflect with this gas, making it extremely harmful. There is no sensation at the onset of the condition, because the gas has a paralyzing effect. When the allergic person inhales the gas, it hinders the ability of the blood cells to carry it, so he dies in a state of no misery.

Or a creature in its body, small, is a bloodsucking worm of the rainforest. It sneaks into the hair of a politician, sucks on his cerebral marrow, and because it injects a paralyzing drug, the person does not feel it, and he dies peacefully.

Probably a variation of leeches.

** An investigation revealed that there was a lot of hair of the deceased in the home of the politician, and an autopsy of the deceased revealed that the deceased's internal organs had been severely damaged. Upon closer examination of the lovedoll, it was found that the lovedoll had been modified to emit high-energy rays. When the radiation dose of the human body reaches 200 600 rem, the human hematopoietic organs such as bone marrow will be damaged, the white blood cells will be severely reduced, internal bleeding, hair will fall out, and the probability of death within two months will be 0 80; When the radiation dose is 600 1000 rem, the probability of death in two months is 80 100; When the radiation dose is 1000 1500 rem, the human gastrointestinal system will be destroyed, diarrhea, fever, endocrine disorders will occur, and the probability of death within two weeks will be almost 100; When the radiation dose is more than 5000 rem, it can cause damage to the central nervous system, spasms, tremors, disorders, drowsiness, and the probability of death within two days is 100.

Lovedoll emits some kind of substance that causes politicians to hallucinate and die.

It was Lovedoll who killed him. This lovedoll is specially made to remotely control the device and control the lovedoll to insert a very small object (such as a needle) into his death hole, causing him to die.

The above 、、、

This cute lovedoll doesn't seem to have any abnormalities on the surface, but there is a solid substance inside it, and when the temperature is 10 degrees higher than normal temperature, it will volatilize a colorless and odorless biochemical gas, and after politicians inhale it, the blood will immediately coagulate and die, so there is no external injury. After the death of the politician, Lovedoll broke away from his body and fell to the ground, and the temperature returned to normal temperature, so it was difficult to find out the cause of death.

--The above is my assumption, hehe. It involves physics (volatilization of solids), chemistry (chemical gases), and biology (blood clotting). Hehe. Hope it helps.

I'm very obsessed with Wesley's **, very fascinated, you can take a look, it's very helpful for you to write**, really.

Alien species, run into his head, let him die temporarily, and later resurrect him.

Hehe, unipolar magnets, I thought about it at the beginning. I'll give you my answer. I can't say it's completely correct, but most of it should be correct, but my knowledge is limited, and I haven't figured it out in some places, so I'll give you an idea.

1. According to the current theory, the magnetism of an object is the result of the statistical regularity of the movement of electrons inside the object, that is, most of the electrons inside the magnet rotate in the same direction (this is a simplified model). In this case, the magnetic field generated by the rotation of the charged particles must produce the same amount of different poles at the same time. Add a uniform magnet with a symmetrical shape, although the particles are not uniformly distributed on the whole magnet, but they are symmetrical, so if they are symmetrically distributed on the left and right, then his ns pole must be half and half.

2. Have you ever tried sticking a lot of bar magnets side by side until the short side becomes long, so that the poles change to the other side. Why? Notice, I said in 1:

The particles are not uniformly distributed across the entire magnet. Landlord: I don't know if you know about the tip discharge phenomenon. If you have learned it, you will understand that due to the repulsion of Coulomb, the electrons inside the conductor will repel each other, and it is not difficult to imagine that the result of mutual exclusion is that they are squeezed to the tip.

So a long magnet, of course, is long at both ends of the tip. Of course, we also have to consider the magnetization effect. In fact, both sides of the flat are also magnetic, but the magnetism is not strong.

If we put the flat side perpendicular to the strong magnetic field, then the flat side is the magnetic pole. That is to say, in the natural state, the pole of the magnet is at the tip of 2, but because the magnet has the ability to be magnetized, it is possible to make a relatively short 1 2 high as the boundary of the upper and lower sides of the magnet under the condition of thinking. As far as I understand it:

The electrons inside the magnet that generate molecular currents have a "memory ability".

3 This should have nothing to do with a hollow solid, because the spherical shape is perfectly symmetrical, and there is no tip. In this case, a spherical magnet that does not have any force acting on the outside world should be non-magnetic. That is to say, after heating it to the point of losing its magnetism, it isolates it from the electromagnetic action of the outside world, and the electrons inside will not be directionally squeezed together under natural conditions, and even if it is subjected to the Coulomb force, it will only be evenly distributed on the surface.

In this way, the electrons in it will rotate casually, and there will be no magnetism. But he can still be magnetized! It is that after magnetization, he can be magnetic, which is the "memory ability", and after magnetization, it should be the two ends of a certain diameter as the ns pole.

4. This theory cannot exist in the present. Because the fundamental reason why a magnet has a magnetic field is the rotation of electrons, the magnetic field obtained by the rotation of charged particles must be bounded by the plane of rotation and the two sides of the ns poles.