"No, no, no, don't be joking!" Liu Weichao heard this and kept saying, "Of course you have to write! Also, those famous people, including Sun Chuanting, Li Dingguo, etc., when they get old and retire, they will retire and return to their hometowns.
When the time comes, you have to let them write, and I want them all!"
"Ah?" Emperor Chongzhen was a little surprised when he heard this, but then he nodded with great interest and said, "Well, when they all have to live a long life, I will let them write it!"
After he finished speaking, he immediately asked Liu Weichao: "I am building a cement bridge here, and I have to cross the train. Is it okay?"
The application of cement has also been used in the Ming Dynasty. Road construction, building houses, etc. Of course, steel is still a pipe product, with priority given to military applications and those with widespread civilian use, such as steel shovels, steel hoes, and plowshares, etc.
Wait, building a house is still considered a luxury. Even Emperor Chongzhen himself held back his thoughts and did not think of building the tallest building in the Ming Dynasty first.
From Tongzhou to Shanhaiguan, we have to cross several rivers. Although they are not as big as the Yangtze River and the Yellow River, there are quite a few. The stone bridges built in the past were used for people walking, carriages, etc. The bridges for steam trains must be newly built.
.
From what Emperor Chongzhen already knew, building bridges with cement and steel bars should be more economical than building bridges with stones in their time. For this reason, he had this question.
For the ancients, there was no problem in building bridges on big rivers such as the Yangtze and Yellow Rivers. Liu Weichao had seen the animation demonstration on the Internet and was very impressed by the wisdom of the ancients at that time.
At this time, when he heard Emperor Chongzhen's question, he immediately smiled and said: "Of course there is no problem, but it needs steel and cement to make it strong."
For this answer, Emperor Chongzhen obviously had an answer, but it was just a final confirmation. Then, he raised another topic and said: "By the way, you have been talking about electricity. Now our Academy of Sciences will have another meeting at the end of the year.
There are many people who have graduated and should be able to get into the electricity field. Do you think they can start?"
Electricity is a very important energy source, and it has been said for a long time before. When Emperor Chongzhen asked, Liu Weichao stopped delaying and immediately said with a smile: "Since you have someone to use, and so far, there is a certain amount of power.
With the basics in place, it’s no problem to start using electricity.”
When Emperor Chongzhen heard this, he couldn't help but be overjoyed. He had long envied Liu Weichao's use of electricity in his world.
But it was obvious that Liu Weichao also knew what he was thinking and hit him directly: "But your technological foundation is limited after all. The application of electricity is still limited at the beginning, and the effect cannot be compared with mine at this time!"
When Emperor Chongzhen heard this, he felt a little depressed. Think about it, Liu Weichao didn't have a special introduction, but just seeing it through the video, there were so many surprises! Now it seems that he still can't achieve it!
But then I thought about it, with Liu Weichao's help, these things that should not exist in this world can be made by myself. No matter what, this is always a progress and can leave a mark in history!
Thinking of this, Emperor Chongzhen became happy again and immediately said: "It doesn't matter, it doesn't matter, I have to eat the food one bite at a time, I know it!"
"It's best if you think like this!" Liu Weichao heard this and immediately said with a smile, "It's actually very simple to generate electricity, but you still need to make some meters first, such as electric meters, and you need multiple departments.
It’s about cooperating with different craftsmen, let me tell you briefly first!”
"Say it!" Emperor Chongzhen heard this and quickly urged, "Say it!"
So Liu Weichao introduced to Emperor Chongzhen: "Electricity generates electricity through electromagnetic induction. This principle has been introduced in the physics book I gave you before. Now that steam engines are available, they can be used as power to convert electricity into electricity.
Kinetic energy cuts magnetic field lines, which means you can start thermal power generation, which is much simpler than hydropower generation and is not easily affected by climate change."
The concept of electromagnetic induction is very mysterious, but it is also easy to remember. Emperor Chongzhen had already memorized it when he got the physics book. At this time, Liu Weichao said these things, including thermal power generation and hydropower generation, and the principles could be understood, so
, he nodded directly and signaled Liu Weichao to continue.
Just listen to Liu Weichao continue to say: "As for the application of electricity, one of the most intuitive is the application of electric lamps. As for the glass factory, you have been operating it for more than a year, and you have asked them to make light bulbs without any problems. Then, there is the filament.
, which is the problem of the object that emits light."
"I use LED lights here. The more primitive ones are tungsten filaments. However, you can't extract the element tungsten over there, but you can use carbon filaments instead. Although the effect is not as good, it's still OK. But in
There is another problem in this!"
Emperor Chongzhen listened attentively, because he had been looking forward to this for a long time, so he was naturally very focused.
"The carbon filament generates heat. If there is oxygen, the lifespan will be very short, and the cost of the electric light will be too high." Liu Weichao said there, "There are two solutions. One is vacuum, which is to remove all the air inside.
Take it out, this is the longest lifespan, you can do it at this time..."
At this time in ancient times, when creating a vacuum, it was actually impossible to create a real vacuum, but only close to a vacuum. The operation was very simple, just fill it with water first, and then pump out the water. This was already done in the West in this era.
This is the famous hemisphere experiment.
When Liu Weichao said this, he thought that Emperor Chongzhen actually had a hobby of appearing in front of others, so he told him the situation with a smile and said: "You can let them try, how many horses can be used to move two people who are close to a vacuum?"
Open the hemisphere!"
"The scientific attitude is all about practice!" Emperor Chongzhen heard this and immediately said with a smile, "As a preacher of scientific knowledge, I naturally have to do it!"
As expected, Liu Weichao thought in his mind, then took back the topic and continued: "Let me go back to the light bulb. According to the development of history, it has been proved that using mercury instead of water to evacuate will have a better effect!"
Edison's light bulbs used mercury instead of water, and practice has proven that carbon filaments last longer.
There is no need to fumble, and you can come to a conclusion. This is the most awesome thing about Emperor Chongzhen’s golden finger.
No, when Emperor Chongzhen heard this, he said with a smile: "What else can you say? Just use mercury!"
"Listen to me first, don't worry!" Liu Weichao was speechless and said to him quickly, "The vacuum bulb does last longer, but there is a possibility of explosion and injury, so it is dangerous."
"Ah..." Emperor Chongzhen couldn't help being surprised when he heard this, and then he said a little frustrated, "What should we do?"
Liu Weichao heard this and immediately said to him: "You can use it in some specific situations. Even if it explodes, it won't hurt anyone, such as open areas far away from people, street lights, etc."
At this point, seeing Emperor Chongzhen nodding, he continued: "Therefore, another solution is not to use a vacuum. Anyway, as long as there is no oxygen in the bulb, our future method is to fill it with nitrogen, but you don't have it either, so just
A similar move can be accomplished in a simple way."
"Huh?" When Emperor Chongzhen heard the simple method, his eyebrows immediately raised, showing great concern.
"Put all the light bulbs in a large glass cover, and then light a fire and burn it inside. As long as the fire goes out, it means that the oxygen inside has almost been consumed. Sealing it is the easiest and most useful method for you at this time!"
Liu Weichao smiled and introduced, "As for improvements, we will wait until technology advances again in the future."
"Okay, okay, this is okay!" When Emperor Chongzhen heard this, he immediately beamed and said repeatedly.
When Liu Weichao saw it, he said to him again: "Your currency has been changed to metal denomination currency on a large scale. Compared with the original metal currency, it can save a lot of copper. Therefore, this copper has good conductivity and is the best way to carry electricity.
It is also possible to use a good conductor, pull it into copper wire, and paint the outside with green paint for insulation. However, if it is outdoors, it is best to put the wires in bamboo tubes or ceramic tubes. This will increase your electricity costs, but it is also
There is no other way!”
After hearing this, Emperor Chongzhen asked curiously: "Have I seen the video you gave me? Those wires set up in the wild don't seem to have bamboo tubes or ceramic tubes!"
"..." When Liu Weichao heard this, he said a little speechlessly, "Please, the technology here is not comparable to yours, how can it be so primitive!"
These words made Emperor Chongzhen blush.
However, Liu Weichao then changed the subject, which made Emperor Chongzhen immediately overjoyed. He only heard him say: "But the rubber we used was already available in your time, and you can use it too."
"Haha, that's good, that's good!" Emperor Chongzhen burst into laughter upon hearing this.
It's okay to be teased by Liu Weichao, as long as you can have it.
Of course, since he is the emperor, he would not mind if he was teased by Liu Weichao from another world. What if it were someone else, try teasing him on his territory?
Liu Weichao saw him smiling so happily, so he hit him and said: "But this kind of rubber was not available in Ming Dynasty, and it is still in South America today!"
"..." Emperor Chongzhen, who was enjoying himself, was dumbfounded when he heard this.
He already had a world map, so she knew where South America was.
It can be said that this is something far away!
Seeing Emperor Chongzhen like this, Liu Weichao became serious and said to him: "Tang Monk could travel thousands of miles to obtain Buddhist scriptures. Can't you send people to follow Tang Monk's example and go to South America to collect rubber tree seeds and seedlings to sow them in the Ming Dynasty?"
After a pause, Liu Weichao emphasized: "And let me tell you, this rubber has a very wide range of uses. It can even be said that it is more important than gold!"
He knew that when something was compared with gold, Emperor Chongzhen would understand its importance.