"They are all a group of people who are not doing their jobs properly, but they are all so awesome that I have nothing to say."
Qin Yi shook his head helplessly and started to look for books.
The library of Huaxia University has a very rich collection of books. Among the entire Huaxia, it is estimated that only Imperial University has a collection that can exceed that of Huaxia University.
The entire huge library has everything from the most basic books to books in professional fields, and all books are numbered. The location of the books can be accurately found on the internal library network, which is very convenient to search.
More than ten minutes later, Qin Yi returned to his seat with a pile of books. There were more than ten books, including books on mathematics, physics, chemistry, biology, and even literature, art, music, etc., which were very complicated.
In other words, you should alternate reading with others, so that you won't get tired and it will be easier to absorb.
"Comprehensive collection of high school mathematics knowledge~"
Qin Yi picked up a book and started to read it seriously. Although he started learning from basic things, Qin Yi couldn't learn the contents of elementary school and junior high school. At the very least, he naturally started learning from high school.
Qin Yi was very good at high school mathematics and almost got perfect marks in the college entrance examination, so when he learned the complete high school mathematics knowledge, it was very easy and not difficult at all.
"My memory has improved a lot, and I can almost achieve photographic memory."
Soon, Qin Yi discovered a huge change in himself. Although he had studied high school mathematics for three years, he did not know how many questions he had done, and he remembered many things very firmly.
But after all, I am now a junior in college, and I have not studied these things for a few years. However, I read books very quickly, almost reading ten lines at a glance, but I remember the content of the book clearly, and I have a photographic memory, and then combine it with
With my previous study experience in high school, I quickly understood the contents clearly.
"It seems that the old man is really not bragging. This genetic optimization fluid is really miraculous. It can really develop the brain, and my physical fitness has also increased a lot."
Qin Yi marveled at the magic of genetic optimization fluid while reading.
"Bragging, I need to brag~"
In his mind, inside the technology tower, the old man couldn't help blowing his beard and staring.
In less than 10 minutes, I finished reading a thick encyclopedia of high school mathematics knowledge.
"Reviewing the past makes you learn the new. What the ancients said is very reasonable. If you study high school mathematics knowledge from the beginning again, your understanding of mathematics will be much deeper."
"Many people think that mathematics is useless, but in fact mathematics is the real foundation of modern scientists. Without breakthroughs in the field of mathematics, scientists will have no way to achieve in-depth development in other fields."
"The real effect of mathematics is not reflected in exam-oriented education, but in one's own mental thinking in the future. Learning mathematics is a thinking exercise process from simple to complex. Many people think that mathematics knowledge is useless in the future. Indeed, if they are not
If you do relevant academic work, you basically won’t need to use much of the knowledge you learned in mathematics.”
"But on the other hand, people who are good at mathematics are often able to deal with many things with clear thinking, logical coherence, and subjective initiative. They can often use their own thinking to hit the nail on the head when many people use stupid methods to solve problems.
Moreover, you can learn all kinds of reverse thinking and transformative thinking, which will be of great use as your accumulation increases."
Qin Yi closed his eyes and kept recalling the knowledge of high school mathematics in his mind. Then he thought about many of his classmates in high school. People who did well in mathematics often had good scores in science, because science requires continuous thinking.
It's easy if you understand it, but it's difficult if you don't understand it.
People who do not do well in mathematics often choose to study liberal arts. Many of the liberal arts are rote memorization and mechanical application, which is very different from the activity of science.
"It seems that I still need to learn more mathematics in the future and exercise my thinking skills more. At first, I thought that advanced mathematics was basically out of touch with the needs of reality. Now it seems that my understanding is still too superficial.
"
Qin Yi gently put down mathematics, picked up the detailed explanation of high school physics knowledge and continued to read. Qin Yi also learned quite well in high school physics, and got very high scores in the college entrance examination that year.
Reviewing the physics knowledge in high school again, Qin Yi learned it quickly. He could read ten lines at a time, turn a page in a few seconds, and read all the detailed explanations of high school physics knowledge in a thick book.
"Qin Yi, did you gain anything after reading this?"
In his mind, the old man chatted with Qin Yi out of boredom. Qin Yi had read the physics knowledge in high school, so the old man naturally knew the level of civilization development on this side of the earth.
“The harvest is okay.”
Qin Yi smiled and nodded.
"Then let me test you. Do you know how to calculate the mass of the earth?"
The old man smiled, rolled his eyes and said.
"What's so difficult about this? According to the law of universal gravitation, f=gmm/r^2, where g=6.67*10^(-11), m is the mass of the earth, m is the mass of an object, and r is the radius of the earth. f=
m*v^2 /r finally simplifies to m=v^2*r/g, v is the speed of the earth's rotation (the speed can be found by knowing the radius of the earth), and the mass of the earth can be calculated by bringing the data in.
"
Qin Yi didn't take it seriously. The calculation of the mass of the planet requires the application of the law of universal gravitation. As long as you know this, you can easily calculate the mass of the earth. This is not a problem for Qin Yi at all.
"Don't just study hard. You remember these formulas, numbers and the like well, but if you were asked to use this tool to measure the mass of the earth, would you be able to calculate it?"
In his mind, the old man seemed not satisfied with Qin Yi's answer, so he smiled and said.
Then, a picture appeared in Qin Yi's mind. In the picture, a thin wire suspended a slender magnetic needle from the middle, and two lead balls were placed not far apart on both sides of the magnetic needle.
"Can this thing measure the mass of the earth?"
When Qin Yi saw this thing, he was immediately confused and a little confused.
"Of course, this thing is invented by scientists on your planet to measure the mass of the earth. It's called a 'torsion scale'. In the 18th century, your scientist Cavendish relied on this thing to calculate the mass of the earth.
exceeds the mass of the Earth.”
The old man nodded very firmly, and then started to talk about the origin and function of the 'twisting scale'.
The basic principle of a torsion scale is to connect two weights of the same mass at a certain height apart at both ends of a rigid rod, and hang them with a twist wire through the center of the rod.
The scale beam can rotate freely around the twisted wire. When the gravity field is uneven, the gravity on the two masses is not parallel. The slight difference in this direction causes a small horizontal component force on the two masses and generates a moment that makes the suspension system
Rotate around the twisted wire until it is balanced with the torque of the twisted wire.
In the 18th century, a problem that scientists on Earth had been struggling with was how to calculate the mass of the Earth. It was not until 1798 that Cavendish finally used the "torsion balance" to calculate the mass of the Earth, which was about 60
It weighs one trillion tons.
Because the mass of the earth was calculated through measurement, scientists soon calculated the density of the earth. Soon, scientists used the same method to measure the even greater mass of the sun, which is 300,000 times the mass of the earth.
is 2 x103o kg.
Subsequently, the masses of other planets in the solar system were also measured one after another. The seemingly simple "twisting scale" was actually able to calculate the mass of huge cosmic objects. The fundamental principle is still the law of universal gravitation.
"I see, but why didn't we learn these things in high school?"
After listening to the old man's explanation, Qin Yi became enlightened. Then he frowned and began to think. Among them, with the current knowledge of physics in high school, it is not a problem to calculate the mass of the earth by himself. You must know that in the 18th century, scientists could already think about it.
Come up with a way to calculate the mass of the Earth.
But I have never thought about this problem. I just memorize it by rote and constantly calculate in the sea of questions. Although I already know a lot of things, when I really want to calculate the mass of the earth, I am completely confused.
"In my opinion, your current education in China actually has a lot of problems, the most serious one of which is exam-oriented education, which only looks at test scores and doesn't care about other things at all."
"Perhaps you are all very good in exams, but when it comes to actual scientific research and exploration, you still need to cultivate your own hands-on and thinking abilities."
"Only in this way can great scientists be born, not nerds who can only answer questions."
The old man pondered for a long time. It had long been connected to the entire earth's network, so it was very clear about the education situation in various countries and regions around the world. Regarding the education model in China, it quickly discovered many problems.
Today, just by relying on Qin Yi, many problems were immediately exposed. As a student from a top university like Huaxia University, let alone his practical ability, his ability to think independently and explore alone makes him very good.
disappointment.
"That's true~"
After listening to the old man's words, Qin Yi thought for a long time and had to nod his head to admit it. Although he could find many points of view to refute the other party, after considering everything he had experienced, he was speechless.
When I was in high school, I was very nervous about studying. If there was content that was not tested, the teacher would simply choose not to teach it. When there were classes that didn’t require testing, such as music classes, physical education classes, etc., other teachers would habitually take up the subject.
All these are enough to show that the current education is exam-oriented education.
It cannot be said that this kind of education does not have any benefits and advantages, but the disadvantages it brings must also be looked at directly. Many things cannot be avoided at all, and the impact it brings is also very far-reaching.
ps: The signing is done, everyone can give your strong support~~~