"Jingle bell—"

The bell rang after class, Teacher Zhang Hua turned off the projector and said, "Okay, I'll go up here today, I'll assign my homework and hand it in next week, the topic is very simple, just one sentence:

Using calculus and geometry to prove that the orbit of the planets around the sun is elliptical......"

The classroom was filled with mourning. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

“...... Okay, class. Yuan Chen, you come out for a moment. ”

Gu Lanlan covered her mouth and snickered, Yuan Chen glared at her, followed the principal to the office, stood still, and listened to Principal Zhang ask: "Did you hack the school's quantum optical network and change the seat information?"

Yuan Chen shook his head and said resolutely: "I didn't." ”

Principal Zhang picked up the purple clay pot, made himself a cup of tea, sat on the chair of the tiger skin master behind the case, sniffed the fragrance of tea deeply, waved his hand and said: "Young people should dare to act! You have this ability, the school is happy to see it, after all, it can be regarded as our educational achievements." You have nearly seven hacker ranks, right?"

Yuan Chen's heart jumped, and he still shook his head and said, "Principal, the technology of 'superimposed mimicry' is too high-end. You think, I'm not even innate, how can I have that divine power to do such a complex operation and invade the quantum brain?"

"That's ......"

Zhang Hua took a sip of tea, leaned back on the chair, tilted his head back, slightly tilted, and after a while, asked: "You, Yuan Chen, and Gu Lanlan, from elementary school to the first year of high school, have been at the same table for nearly ten years, either at the same table, or at the front and back tables. What do you think about this?"

The morning sun shines in through the screen window, reflecting a few points of floating dust, which are bright and extinguished, shining on the top of the principal's head, sprinkling a deep halo, blurring his face, two deep dark lights staring at him, ghostly fire, bringing a strange pressure, Yuan Chen is unconscious, and said: "Teacher, from a statistical point of view, although this incident is a low probability, it is not zero. ”

"Interesting!"

When Zhang Hua heard this, he laughed, swept away the haze in the room, and waved his hand: "Go back!"

Yuan Chen poured out the door, closed it gently, breathed a sigh of relief in his heart, rushed downstairs to buy two bottles of Danhua purified water, returned to the classroom, handed it over and said attentively: "Lanlan, are you thirsty, do you want to drink some water?"

Gu Lanlan took the bottle, put it on the table, didn't drink it, buried her head in the jade light book, and muttered: "Little atom, my first homework in high school, Principal Zhang from the sky will help me, I must be faster than you!"

Seeing that she ate the sugar coating, flashed the cannonball, Yuan Chen didn't say a word, spread out the jade light book, unfolded the white pages, picked up the pen and wrote, the formulas flew down, the law of gravitation, the simplification of particles, the establishment of models, differential equations...... While calculating, he said, "Aren't you curious, the principal brought me over and asked something?"

Gu Lanlan frowned, kept writing, and asked, "Okay, little atom, let me ask you, what did the principal ask you when he brought you over?"

"Hey, don't write when you ask someone, it's basic etiquette, right?"

"Which family's etiquette, this girl has never heard of it!"

“...... You say that Lao Zhang is not cruel? Just after learning calculus, let us prove the orbit of the revolution, if we learn the theory of relativity, will we directly ask Mercury to move in the near future?"

"Lao Zhang teaches mathematics, the theory of relativity is physics, it's none of his business......"

The two of them were stumbling and calculating at the same time, "Jingle bell-" The class bell rang, and an old man paced in outside the door, with a long shirt and a long beard, bent over, with his hands behind his back, gray hair, wrinkles, and a little clear in his eyes. ”

"Stand up!"

"Hello teacher!"

"Hello students. ”

"Sit down!"

Sitting down, the old man's speech was still very clear, he raised his head, and said steadily: "The old man's surname is Kong, his name is B, and his name is Annie, and he teaches physics." Have the students all pre-studied?"

"Preview—" replied neatly.

"Is there any problem?" asked Old Man Kong.

Students, you look at me, I look at you, no one answered, paused, Old Man Kong raised his legs and left: "Since there is no problem, I just understand, Sensei teach!"

“！”

With such a unique teacher, a group of students were really stunned and couldn't react.

Old man Kong came in slowly, went out quickly, and in a blink of an eye, he arrived at the door, and when he saw that he was about to disappear, Yuan Chen threw down his pen, stood up and asked, "Teacher, student, may I ask about negative entropy." ”

Old Man Kong stopped, seemed to sigh, slowly turned around, got on the podium, and said, "This question is very big and general. It's not a good question, but since a classmate asked, Lao Yu tried to answer it. ”

As he spoke, he clicked on the hologram, raised his bony and sleek arm, and wrote two formulas in mid-air:

S=klnΩ

dS≥dQ/dT

After looking at it for a while, he shook his head and wiped it off again, "These two formulas are very good, but the students have also seen them, and there is no doubt, so I won't say more, let's look at this cup in another way." ”

Old man Kong raised his hand and held out a glass cup, which was clear and colorful, "Is this cup good-looking?" Because the overall molecular arrangement of this isolated system is orderly and concentrated, so it appears uniform and extraordinarily beautiful, and we can say that it is in a state of low entropy......"

As he spoke, as soon as he let go of his hand, there was a crisp "pop", and the glass cup fell to the ground and fell into a pile of pieces, large and small, a dozen pieces, lying there, one here, one there, "Now, this cup is not very good-looking." This system is no longer orderly and centralized, but presents a disordered and scattered appearance, which is very chaotic, very mixed, and very mixed. At this point, we can say that it is in a state of high entropy. ”

Old Man Kong waved his hand, and the fragments flew into the air, slowly spinning, "Without the help of external forces, these fragments will never be able to gather into a cup again and return to its low-entropy state." They can only break into smaller, more and more chaotic pieces over time, and the entropy will get higher and higher. ”

This is the entropy formulation of the second law of thermodynamics: the entropy of an isolated system always tends to increase, that is, it always tends to be chaotic. Assuming that this law has not been invalidated, extrapolating it to the entire universe and treating the universe as an isolated system, we can derive the apocalyptic state of the universe, which is called heat death. This thing is very bad, very pessimistic, and the students are very interested in this, but there is no positive energy in this, and it is not what I want to talk about today. Let's talk about negative entropy. ”

As he spoke, Old Man Kong stopped, and out of nowhere he found a small teapot, and without using a cup, he drank a big sip directly to his mouth, smashed it, smashed it, coughed, waved his hand, and the empty fragments were put together again, and re-condensed into that gorgeous glass cup, floating and sinking in mid-air, showing a special beauty.

"This polymerization process, reflected in reality, can be refurnace reengineering, can be molecular gluing, can be time reversal, anything, can be said to have input negative entropy into this system. ”

From this, the students can see the usefulness of negative entropy, end the chaos, and return to order. ”

"Take the popular "Three Kingdoms" in the current fantasy realm, for example, in the end, the Sima family unified the Three Kingdoms and pinched the scattered Central Plains system into a whole, which can be said to be his family's contribution to negative entropy. ”

"This negative entropy is very useful and significant, so big that it can't be said for three days and three nights, let's talk about its significance to life first. ”

"There is a great scientist in the West, named Schrödinger, everyone should have heard of him as a cat sadist, this is a quantum mechanics thing, I am not in a hurry today, I will talk about it later. This Xue family is a very smart and talented person, and he put forward a concept called: Life depends on negative entropy to survive. ”

This sentence has two meanings, one is material, and the physical, which is food. ”

Old man Kong waved his hand to disperse the glass cup, circled out two small boxes, both covered with cloths, he lifted the left one, it was a plate of fennel beans, hot, the whole classroom was full of aroma, and many students subconsciously swallowed their saliva.

Yuan Chen and Gu Lanlan glanced at each other, but they both saw bad signs.

: Little atom, you're going to die!

I only know about negative entropy, but I don't know that this teacher is so violent......

"We eat and drink on weekdays, metabolism, absorb nutrients and energy in food, and in the end, it can be said that we take in the orderly structure of food, so as to keep ourselves neat and orderly, not chaotic, which is called ingestion of negative entropy. ”

"Okay, here's the question. ”

"We have ingested the orderly structure of the food, and accordingly, the food will lose its order, become chaotic, and what has become, let's take a look at ......"

Some of the students' faces were already green, and Old Man Kong smiled, stretched out his withered arm, and lifted the cloth on his right.

It was a poop.

The yellow pile, piled on a white plate, was also hot, steaming, and the smell spread throughout the classroom, mixing with the aroma of fennel, and hitting the nose, which was really irritating.

"Vomit—"

The students in a classroom, one counted, all had green faces, and most of them lay down, retching.

A few stubborn, vicious looked at him, glaring at Yuan Chen, as if they were going to tear him alive.

Yuan Chen sat quietly, with an innocent face, facing this bleak life.

Gu Lanlan lowered her head earlier, lying on the table, her shoulders twitching, as if she was disgusted, Yuan Chen didn't need to look at it to know that she was laughing.

Old man Kong put his hands behind his back, smiled and admired the strange scene of retching in the room for a while, and said slowly: "What kind of spirit is the food that is willing to be eaten by others, so that it has become like this?"

"Students, this is the spirit of self-sacrifice! What can we do about this spirit?"

"Respect it. ”

"Respect for food is like respect for knowledge. ”

Old man Kong waved his hand and dispersed the two boxes, the aroma and smell disappeared, and his face became solemn, "Food tidily our bodies, knowledge tidiness our spirits." ”

"Reading, thinking, reasoning, learning the Tao, and obtaining information are negative entropy input into our brains, our spirits, and our souls, so that they will not become a pile of dung!"