In fact, Wang Zhan still has something to say. Who knew that the audience would pass out so soon? Could it be that Mr. Ouyang actually meant to ask, "Is it necessary to wear anti-gravitational wave maternity clothes?" ”

Well, the audience passed out anyway, so Wang Zhan had no choice but to swallow the tirade that he was about to sprinkle and eloquently into his stomach, muttering: "Ignorant woman ......"

Teacher Ouyang stroked his hair and said, "I'm sorry, it's all my fault, I shouldn't have asked about gravitational waves, we girls can't have spatial perception, otherwise why are there so many road blindness?" ”

Wang Zhan: "I can't talk to you guys, I'll talk to our old men, Ni Hong!" Come here, Uncle Wang will give you a science about gravitational waves. Hey, do you know what gravity is? ”

It is conceivable that Ni Hong, who is at the kindergarten level, doesn't know anything, and shakes his little head in confusion.

Wang Zhan: "The earth is round, do you know?" ”

Ni Hong: "Yes. ”

Wang Bang: "Aren't you curious, why are you standing on a big ball but not falling?" Falling into space? ”

Ni Hong: "Because ...... The earth is big enough, big enough that I won't fall out. ”

Wang Zhan: "...... It's a unique perspective...... Come on, like Uncle Wang, jump, jump, and feel what is pulling you back. ”

Ni Hong followed the unreliable Uncle Wang for a long time, and finally suddenly realized: "I know, there is gravity that pulls me back, so I won't fall from the earth to outer space!" ”

Finally got the hang of it, albeit a little late.

Wang Fang explained to Ni Hong step by step, and dipped a drop of water with chopsticks, and used an inverted dew drop to demonstrate to the children how the water molecules attract themselves and hug each other.

Teacher Wang said: "The gravitational field, just like this water droplet, itself is composed of very small gravitons, filling the whole world, and it is impermeable to the wind, and it is slippery and does not leave your hands, as long as the weight of the thing shakes in this field, there will be waves, gravitational waves are this kind of shaking waves, but they are too small and weak for the human eye to see." ”

Ni Hong also seemed to be surprised, gravity is actually like a wave? He actually forgot about the game in an instant, and immersed himself in the gorgeous world of imagination, but he didn't know if the gravitational waves in his small brain would be consistent with what Mr. Wang wanted to express.

Ouyang Fen said: "I feel that if you go on like this, you can educate my son to become a scientist." ”

Teacher Bai: "I don't know if you want Ni Hong to become a scientist or a businessman?" ”

Ouyang Fen: "It's okay, as long as you become an elite, it's better to be a scientist and a businessman." ”

Wang Bang teased: "Like the CEOs of Tesla and SpaceX, right? ”

Teacher Bai suddenly interjected: "Huh? Finally came up with a not-so-cold topic, talk about Tesla! Why is Tesla successful? ”

Ouyang Fen praised: "Yes, Teacher Bai, this is good." ”

Wang Zhan: "Who said Tesla succeeded?" 700,000 cars, Tesla, which loses money every year, has not succeeded no matter how you look at it. ”

Ouyang Fen: "Ah! You're not bullish on Tesla? Unexpectedly, aren't technologists like you optimistic about Tesla? ”

Wang Fang: "You are on the point, now Tesla is valued at tens of billions of dollars, completely because it is favored, not because Tesla has succeeded." Why is Tesla favored? At first glance, it may seem like electric vehicles represent the future, but this is not necessarily the case.

Tesla's biggest problem is that it plays the environmental protection card to protect the earth, environmental protection itself is synonymous with failure in business, if it can be successful commercially, why play this card? You know, companies that rely on government subsidies will not succeed. Even if it succeeds, it will only be a small fight, and people are so optimistic about Tesla now that they will definitely not think that it will only be used for small fights in the future, right? ”

Ouyang Fen: "I heard that the biggest problem with electric vehicles is the battery, if the battery is powerful, the electric car can crush the fuel car." ”

Wang Fang: "However, there has been no progress in battery technology for many years, although Tesla's battery management technology is very good, but there is no qualitative change, MODEL-S a set of batteries costs tens of thousands of dollars, and you can directly buy a gasoline car." THEREFORE, THE RISK OF INVESTING IN TESLA IS VERY LARGE, THE MODEL3 BATTERY WILL SHRINK, AND NOW THE UNLIMITED TESLA MAY SOON BE COMPLAINED ABOUT. I have a golden idea, if it is thought of by some boss in the automotive industry, Tesla will be finished. ”

Teacher Bai: "So powerful? ”

Ouyang Fen: "Teacher Wang just likes to brag. ”

Wang Zhan: "The designers of the current hybrid car just don't understand it, in fact, their plan can overcome the expensive problem of the current hybrid car in one fell swoop with only a slight change. They always want to use both the electric motor and the internal combustion engine.

My golden idea is to use the pure electric propulsion technology on the Queen Elizabeth aircraft carrier to the hybrid car, the traditional engine is completely abandoned, gasoline is used to generate electricity, and only after the power generation is generated will the motor be pushed to rotate the car, don't always hold on to the traditional engine, as long as the mechanical system is abandoned, the price will drop immediately.

You know, in addition to the expensive battery, the motor system is not expensive other components, in this way, this is equivalent to a non-environmentally friendly version of the fuel cell vehicle, the battery life is absolutely no problem, you think that everyone can use this technology for aircraft carriers, is the battery life still a problem? It must be as many kilometers as you want, and it is a question of the size of the tank.

As for the battery used to buffer power, it can also be large or small, the entry-level product can only be 30 kilometers, the advanced can be 50, 100, the battery will be cheap in the future, you can go directly to 500, 600, and the process of abandoning the fuel tank is so smooth. ”

Ouyang Fen: "Are you sure that the current hybrid cars do not have pure electric propulsion?" ”

Wang Bang: "No, otherwise the engine will not be so expensive, you always say that I am a wooden head, in fact, the traditional car factory is a wooden head, I have read Musk's biography, I know how rigid Tesla's competitors are, they just can't abandon the traditional engine, and they are carried away by mechanical aesthetics." ”

Teacher Bai: "It's a pity, it would be great if you went to be the owner of a car factory!" ”

Wang Zhan also looked distressed: "God didn't give me a chance, otherwise I would lead the domestic car factory out of Asia to the world!" ”

The two daughters couldn't laugh well.

Wang Fang: "Actually, the biggest advantage of pure electric drive is automatic control, that is, unmanned driving, so you will find, huh? Why is the first automatic cruise technology that can be taken off the steering wheel to consumers actually came out of Tesla, and now many Tesla owners are experimenting with this thing. This is because pure electric technology can be easily combined with automated processes.

In my opinion, the development of the unmanned driving industry has taken a detour again, whether it is Tesla or Google, it is not efficient. Because they start with ordinary family passenger cars, which is going too fast to the egg. I think it should be the truck that uses driverless technology first, and the fixed line first, because it will greatly reduce the difficulty of development.

In fact, ordinary car owners do not have this pain point, and they do not have many opportunities to drive, so they will commute to work and go to a nearby farmhouse on weekends. The real pain point is long-distance truck drivers, as long as you think about it, you can know how painful the old drivers who drive trucks, so whether it is a truck driver in the United States or Australia, the salary is frighteningly high, which is the pain point of the industry.

If I were the chief engineer of the autonomous driving system, I would put the unmanned 1. 0 is regarded as a high-tech train, no rails, and in the initial stage, old drivers and engineers must be sent to stay in the truck, ready to guard against sudden accidents, just like our subway system, many of which are self-driving, but also equipped with an old driver.

Walk slowly like this so that you won't get the eggs. Slowly increase the number of self-driving trucks, slowly reduce the number of old drivers, step by step, one day, people look up coldly, there is no one in the truck! And it worked. At this time, the technology must be quite mature. ”

Ouyang Fen said to Teacher Bai: "It seems to make sense, but Lao Wang said that Google and Tesla are wrong, how do you look like a keyboard warrior." ”

Teacher Bai nodded vigorously: "Yes, proper keyboard warrior." ”

Wang Bang said angrily: "Keyboard warriors also want to fall in love...... No, change the world too! ”

Teacher Bai was still gentle and comforted him: "Well, maybe after our show becomes popular, it will affect the rich bigwigs, and they will lead the domestic unmanned driving...... Trucks, to the world. ”

The angry old man went to chat with the old man again: "Ni Hong, uncle told you, the progress of technology is like the evolution of biology, it is slow step by step, the evolution is too fast, but it will not adapt, and it will be difficult to succeed." ”

Ni Hong seemed to have a little bit of interest in science, asking, "What is evolution?" ”

Wang Fang: "That's it...... Once upon a time, our ancestors were fish, living in the sea. ”

Ni Hong: "Huh? Our ancestors were mermaids? ”

When the two girls heard this, they all burst out laughing.

Wang Fang: "It's not a mermaid, it's not like a human at all, it's a real fish, the ancestor fish will have some genetic mutations in every generation of children, what is the gene later, anyway, it's a little different from the parents, some baby fish are particularly tolerant of drought, because of this ability, those monsters who want to eat them are very difficult to get, because they will run to the shore, at that time, almost all animals live in the water, can't stand the dryness of the ground, they leave the water, and can't even breathe."

Therefore, enduring drought has become a kind of survival ability of our ancestors, which is a very outstanding one among thousands of skills. When they grew up, they had their own babies, and some of the fish fathers who had the ability to tolerate drought became married to the fish mothers, and the fish babies were more able to tolerate the drought, and after year after year, generation after generation of fish babies, our ancestors even liked the drought, and ran to the shore to play when they had nothing to do, and finally we left the sea permanently and never went back. They have also become a completely different creature, no longer called fish, but reptiles!

That's evolution, you know? ”