"The husband must make this thing." Listening to her words of encouragement, Zhang Yang frowned as he looked at the drawings. In order for this pendulum clock to operate, it needs to rely on the potential energy of gravity.
Keep the object falling slowly while gravity is acting on it, and the drive gear makes the pendulum swing back and forth.
The swing of the pendulum drives the clock. Zhang Yang wrote down the formula of a pendulum. This kind of creation that combines mathematics and physics is quite difficult.
It was late at night, and my wife went to bed early with her daughter in her arms. Zhang Yang walked to his yard, looked up at the stars and said nothing for a long time, thinking about the only remaining knowledge in his memory.
It is necessary to pick up the theorems and formulas that have been forgotten for a long time. This feeling is very painful. It would be better if Zhang Heng was alive.
After scratching the back of his head painfully, the snoring of the little bear could be heard in the yard. After washing up, Zhang Yang fell asleep.
In the early morning, Zhang Yang walked out of the room wearing his coat and saw his wife looking at the formula in trance. Her eyes were looking at the formula of the pendulum, as if she was thinking about it, and after a moment she shook her head, as if she had given up.
"Any clues?"
"It's difficult." Li Yue came to such a conclusion.
"I felt the same way, so I came to a conclusion last night."
"What conclusion?"
"Unless Zhang Heng is alive, he might be able to figure it out." The fragments scattered throughout the Central Plains have not been collected yet. Li Tai said that he asked people to look for them, and there is no news yet.
Zhang Heng had a very high level of numeracy and astronomy throughout his life. It would be best if his fragments could be handed down and would be valuable for collection.
Not much wisdom has been passed down from ancient times to the present, and many of the crystallizations of wisdom have been lost. Since his holiday in the twelfth lunar month, and now in the new year, Zhang Yang has returned to his usual leisurely appearance, dressing like a country man, and his words and deeds have returned to the past.
He is no longer as restrained and polite as when he was an official in Chang'an City.
"Damn Zhanluan! This evil family." Zhang Yang yelled,
"You will only act in your own way and not seek the welfare of the masses. You will live like gods and not know the sufferings of the world." In the early morning, the master shouted to the sky again.
Xiao Wu and Xu Hui just woke up and were sitting on small stools washing themselves.
"If you don't use your wisdom for people's livelihood, but seek benefits for your immediate status, you are the real villains." Throughout the ages, people who want to be immortals will die badly.
Especially those ancestors of aristocratic families who already live like gods. Even if they are still at large, they must die a good death. Zhang Yang gnawed the meat buns fiercely and continued to focus on the formula, his eyes bloodshot as he pondered hard.
After thinking for a long time, I went to do the carpentry work. Clocks can also be regarded as furniture. Having a clock at home can give you a better sense of the passage of time. At least you can know what time you go to bed and what time you eat.
Li Yue looked at her husband's almost bewildered state and whispered: "There are no more duck eggs at home." Zhang Yang put down the wooden hammer in his hand,
"I'll go get some from the duck pen in the village."
"Yeah." Xiao Wu relaxed a little when he saw the teacher's original nervous expression.
"Teacher, are you worried that Master will get angry and angry?" Li Yue nodded without denying it. Xu Hui also said: "Well, if you keep immersed in your thoughts, you will only become more confused. The teacher wants the master to go out to relax, but in fact there are duck eggs at home." The two disciples were very smart. Li Yue tied up her hair. , and then help them tie up their long hair.
After getting ready, Aunt Yang also brought the wooden sword. The three masters and apprentices began to practice swordsmanship. Zhang Yang came to the duck pen in the village. The village seemed quiet early in the morning, and he met Li Tai here.
He washed a plucked and gutted duck in clean water. Zhang Yang looked at him curiously and asked: "Your Highness, King Wei, are you planning to eat duck this morning?" Li Tai raised his head and said with a smile, "It will take half a day to roast over charcoal fire, and it will be good to eat at noon." This fat man became more and more specialized in eating. As we go deeper, there are more and more ways to cook delicious food.
"Brother-in-law, what are you doing here so early in the morning?" Hearing his question, Zhang Yang lowered his body to pick up duck eggs.
"We've finished eating the duck eggs at home." The two of them walked to the outside of the duck pen and closed the fence again with their own thoughts, and sat on the stone beside the field ridge.
Li Tai handed the duck to his bodyguard and said in a deep voice: "There is news from Luoyang again. It is said that Sun Fujia imprisoned the children of the aristocratic family for a month and wrote down more than 30 charges." Zhang Yang He sighed: "That's a good thing."
"But some people say that Sun Fujia imprisoned those children for a month. Ordinary prisoners would not be tortured for a month. They must have been beaten into a crime. Even if the children of the family admit these crimes, someone will come out to refute them." Zhang Yang There was no reply for a long time.
Li Tai looked uncomfortable, as if he had eaten a bug.
"Why do they confuse right and wrong? They insist on saying what is clearly black and white, brother-in-law! What's wrong with this world?" Friends have deceived each other and plotted against each other.
After so many years, Li Tai turned sixteen without knowing it. He was in the most critical stage of his life and the age when he was most likely to be rebellious.
Children at this age are in the process of understanding the world. Fortunately, this fat man still knows what is right and what is wrong.
Zhang Yang sighed: "I am very pleased that His Majesty the King of Wei can say this." The little bear walked lazily in the village early in the morning, sniffing towards the east, and then pawed away the puppy that came up to him with its tail wagging.
To him, the overlord of Lishan Mountain, these puppies don't know whether to live or die.
"Your Highness King Wei, when those scholars stand up and start to oppose the noble family, it means that there is still justice in this world. Justice is a very magical thing. It will spread in people's hearts and be used to overthrow all injustices. What they lack now is It's just strength." Li Tai's chin already had a soft black beard, and he exclaimed: "What kind of strength is missing?"
"This power has many aspects. For example, a person who can unite them is like when Chen Sheng and Wu Guang rose up." Seeing that Li Tai looked wrong, Zhang Yang said again: "Don't be afraid, Your Majesty the King of Wei. I was just making an analogy. At first I I have also persuaded your father to stand on the side of the masses, but he has never answered directly. Maybe your father also has concerns." After chatting with Li Tai for half an hour, he talked about the future construction of the village, Bai Tang The secret recipe has been sent to the palace, and it is impossible for Lishan to continue to produce sugar.
After the Lantern Festival, the village will officially start construction, and the raw materials hoarded last year can now be put to use.
When I was walking home, Aunt Wang came with a pole and a stone of fine salt. She put the fine salt in the yard and explained: "This is sent by the queen." Li Shimin got the Tubo Salt Lake. What he lacked most was this kind of fine salt. Even with the fine salt, he could not quickly use this salt. Put the land on the market in exchange for money.
Firstly, the price of salt must be controlled, and secondly, the DPRK and China need to have control over the price of salt. Salt and iron are important weapons of the country, and the government must always hold them in their hands.
Zhang Yang heard the news that Aunt Wang brought back from Chang'an City. Because of the incident in Luoyang, Duke Zheng went to see His Majesty again and pointed at His Majesty and cursed him.
It is said that His Majesty is indecisive, but he should continue to make decisions. Wei Zheng is a very upright old man, and he knows right and wrong very well in his heart.
If it hadn't been for his persuasion, Li Shimin might have actually married the engaged woman into the palace, thus causing another joke.
Being an emperor is painful, and Li Shimin, the Heavenly Khan, is also suffering. The ministers of other families were all obedient. During the Zhenguan Dynasty, if his Khan had something wrong in his words or deeds, his ministers would take it out and draw inferences.
Today's officialdom in the Tang Dynasty is still relatively clear. The emperor is open to opinions and actively accepts advice. In addition, the folk customs of the Tang Dynasty were fierce, the generals were heroic, and the literati were even more willing to be killed.
Things in Luoyang were slow to come to an end, and Wei Zheng struck hard at Li Shimin. In the end, this Tian Khan verbally promised Wei Zheng that he would severely punish the children of the family, but the decree of severe punishment has not yet been issued.
Zhang Yang made a gear set at home and found an iron ingot from the toolbox. This was the iron material made by Lishan Blacksmith.
The portion is generous, square and well-proportioned. Tie the iron nail with hemp rope and wrap it around the gear set. The gear will rotate every time the iron ingot drops one inch.
Until the iron ingot fell to the ground, Zhang Yang recorded the weight. Then use a larger gear set and install it on a stand. Because the thread ends are wrapped around the gear set, the iron nail falls much slower this time with traction.
Finally it stopped half hanging. Again record the number of times the iron wheel turns. Zhang Yang wrote on a piece of paper beside him that the gravity exerted by an object is the product of the weight of the object and its height.
With this formula, you can calculate the corresponding weight by working backwards. The yard was very quiet, Xiao Wu and Xu Hui were doing questions.
Li Yue looked at her daughter's little hands clumsily adjusting to Taikoo, as if her fingers would get knotted. She wanted to throw away the annoying Kuaizi, but when she saw her mother's stern eyes, she lowered her head in fear.
Children need to learn to use tachyon slowly, and she is only one year old. In the end, I struggled to dig out the rice grains with a spoon and eat them.
Li Yue saw her husband constantly thinking about it, so she walked aside and watched quietly, with soft eyes and a slight nod.
It seems to be confirming whether this algorithm is correct. Zhang Yang tied a few more grams of stones to the iron ingot, and this time the gears continued to rotate for a while.
Until the iron ingot fell, Zhang Yang took notes again. This time it took ten breaths to land. The husband spliced the wooden strips between the gears and tightened the hemp rope again. As the iron ingot fell due to gravity and the gears rotated, the wooden strips began to swing.
"If it is allowed to swing for a day, will it also take a day for this iron ingot to fall to the ground?" Zhang Yang shook his head and said: "Not really. If you can make a clockwork, you can find a way to make it do the work of rising and falling. As long as But it's very complicated." He paused for a moment and then said: "But I can do it for three or two hours and continue to operate in a cycle. I just need to splice a few more groups of gears. The gears also have losses, and they need to be used during the transmission process. Increase the weight." Li Yue, who was not good at physics, just listened.
It’s not easy to keep up with your husband’s thinking. After several experiments, the ratio was calculated. It is known that the pendulum swings once per second, and the period formula of each swing amplitude can be calculated by determining the length of the pendulum.
Zhang Yang finally finalized the drawing, which is a large pendulum clock nearly three meters high. This is because in order for an object to fall to potential energy due to gravity, it needs a high enough altitude.
The height of three meters is enough for the pendulum clock to rotate for twelve hours. This is just looking at the limit that Lishan's current technology can achieve in twelve hours.
It's not like I haven't thought about building a huge bell tower so that the whole village can feel the time.
If it is really built, it will be more than ten meters high, which may exceed the limit. In the laws of the Tang Dynasty, tall towers are not something you can build casually.
What a pedantic system. Zhang Yang felt scornful in his heart and put the plan on hold for now. After finishing this, Zhang Yang sat in the rocking chair, closed his eyes and let his mind empty.
With such a complicated calculation, it feels like the brain in my head has turned into a lake of slurry at this moment. Originally there were still fifteen days of rest, but he spent ten days studying the pendulum clock.
Zhang Yang installed a wooden wheel on the bottom of the pendulum clock and pushed it out from home. Under the surprised gazes of Li Tai and Li Yuan, Zhang Yang looked up at the sun.
The nearly three-meter-tall pendulum clock was very conspicuous as it moved forward. Curious eyes from all around fell on this tall wooden pendulum clock.
The top of the pendulum clock is pointed. At first glance, I thought it was a weird house. There is also a compass embedded in the middle of the upper edge of this weird house.
Xiao Wu and Xu Hui are waiting for the time according to the scale of the sundial. When it was noon, Zhang Yang pulled out the latch. The lower part of the pendulum clock was hollowed out, and the swing of the long pendulum could be clearly seen.
As the long pendulum swings, the minute hand also begins to move. Li Yue held the booklet and looked back and forth between the sundial and the pendulum clock. When the shadow of the sundial pointer moved with the sunlight, the pendulum pointer also moved with it.
Seeing a quarter past noon, Li Yue drew the position of the minute hand and the clock, turned the page, and waited until a quarter later to continue recording.
Fortunately, his efforts were not in vain. Zhang Yang said happily: "Congratulations to His Majesty the King of Wei. Congratulations to the Supreme Emperor. Our Tang Dynasty has a clock. This is a great joy." Li Tai and Li Yuan's grandson were both silent. Silent.
They can't figure out what benefits this thing has for people's livelihood and the country. Seeing him ecstatic again, the grandfather and grandson frowned.
Li Tai stayed away from his brother-in-law, who was so happy that he didn't know why. He came close to his grandfather and whispered: "Has your brother-in-law eaten anything dirty recently?" Li Yuan also looked at Zhang Yang, and he held Yue'er in his arms and spun around happily. , also whispered: "It's true, what did your brother-in-law grow up on?" Just like what Li Xiaogong often talked about, what exactly did this Yang become.
To say that this person is talented, he can also write books such as Red Mansions and Liaozhai that are worthy of being handed down from generation to generation. You could say that this person is weird. He is so happy to have made such a pendulum clock that he doesn't know what purpose it is used for.
The joys and sorrows of people are incompatible with each other. Zhang Yang created things like a pendulum clock to celebrate the advent of clocks in the Tang Dynasty.
Li Tai walked away and shook his head and sighed. Sooner or later, if his brother-in-law continues like this, he will become a madman in the eyes of others.
