Live broadcast: Ancient people accompany me to make up lessons

["The fifth lucky audience member, it's your turn."

After explaining a few physics formulas to the studious audience, Xiaoxiao stuffed a strawberry into his mouth and continued to call. 】

Many people were confused by the lecture, and those who had given up on the lecture were refreshed and looked at the sky with renewed anticipation, hoping that Li Chunfeng could ask something else, at least about gravity and constants.

Li Chunfeng didn't know other people's resentments, and he didn't go to court. He had some exchanges with several officials from the Taishi Bureau. He obediently saluted to the sky, and then asked: "Excuse me, the anchor, since everyone is standing on the earth. , then why won’t we fall, and what is the universal gravitational constant in the formula for calculating the volume of the earth?”

Ying Zheng: I will continue reviewing the memorial after I finish listening to the previous question.

Liu Che: ...Listen to the first one, the second one will give you a headache.

Deng Sui: Let’s all listen

Li Shimin: Li Qing’s question is indeed a good one. He is worthy of being the official of the Tang Dynasty (no typo, that’s the official).

["Why can people stand on the earth? Because the earth has gravity, which will fix people on the earth, so we will not fly or fall. We are attracted by the earth when we are on the earth. That force is gravity.”

She took a sip of milk and continued: "The gravitational constant is a bit troublesome. Let's talk about universal gravitation first. The British scientist Newton described the law of universal gravitation in his "Mathematical Principles of Natural Philosophy" like this:

Any two particles have a mutual attraction force in the direction of the line connecting their centers. The magnitude of this gravitational force is directly proportional to the product of their masses and inversely proportional to the square of their distance, and has nothing to do with the chemical composition of the two objects and the type of medium between them. "

She picked up the pen and wrote the gravity formula on a piece of white paper. Then she read out each letter and explained what they were.

"F: the gravitational force between two objects, M: the mass of object 1, m: the mass of object 2, r: the distance between the two objects. G represents the gravitational constant, and its value is approximately 6.67x10 minus 11 The power unit is N·m2/kg2. Newton could not calculate this value at that time. It was later measured and tested by Cavendi, another British scientist."]

Ying Zheng had already started correcting the memorial again. Fu Su was also dizzy after listening to it, but he had to follow the palace servants to copy the records on the silk cloth, and he couldn't make any mistakes.

It's not just them, here, people without talent and love can't listen to it. Not just one percent, not even one in a thousand or ten thousandth, may not be able to understand.

Zhang Heng spread out the piece of paper given to him by the Queen Mother and started recording like crazy. He couldn't wait to ask the host a lot of things. He didn't know if the lucky audience who had one hour left in the morning could get it, and if there would be another chance in the evening.

"Qingque, do you understand?" Li Shimin looked at his fourth son expectantly.

Li Tai almost wanted to cry: "Aye, you'd better ask Li Shilang, I really don't understand."

Li Chengqian looked at his unlucky brother and wondered what he should ask the anchor later.

["These things are very complicated. Those who still find it interesting after listening to the formula are those who have some interest and talent. By the way, we are next, the sixth lucky audience!"]

Most people breathed a sigh of relief and looked forward to the next one rushing over.

The eight-year-old boy Zhang Sui looked at the sky, but those magnificent and beautiful stars seemed to appear in front of his eyes.

He likes these.

So he didn't ask the anchor any questions. He just saluted to the sky and asked, "Anchor, can you let me look at the stars in the solar system again?"

Some people think it's great and they want to continue looking at the stars, while others think it's a waste. It's better to give him such a good opportunity without asking anything.

["Of course, then I will find a live broadcast, and you can watch it slowly on the secondary screen."

When Xiaoxiao saw this barrage, she thought there was nothing wrong with this person liking astronomy. She touched the mouse and the computer that was still on lit up instantly.

I found a live video of the space telescope and showed it to him to watch slowly.

The beautiful planet appeared again, which touched the hearts of many people, and Xiaoxiao began to call again.

"The seventh lucky viewer, it's your turn."]

Li Chengqian, who kept in mind that he was the seventh, quickly stood up from the case. Looking at the expectant eyes of his Aye and his brother, as well as the hopeful eyes of the ministers next to him, he was a little nervous. When the words he originally wanted to ask came to his lips, he suddenly Changed the topic.

"May I ask the anchor, how many things have you learned from so many books?"

Regarding schoolwork, that’s a good question.

Li Shimin looked at his son with eyes full of pride, and the ministers' faces were always happy.

Li Taila pulled his brother's sleeve: "How do you ask about your homework?" Didn't we agree yesterday that the lucky guy would ask the host how to grow that big watermelon?

When can I eat his melons, the big green and red watermelons...

Li Chengqian: No, actually I wanted to ask the anchor if there was any way to teach Qingque those formulas to you...

[When I read this question, I felt a lot of pressure.

"Not much, just nine lessons."

She picked up a few of her books and spread them out in a fan shape: "Chinese, mathematics, foreign languages, physics, chemistry, biology, politics, history, geography. What I just did was the geography paper. The ones about gravity and gravitation that I asked before were all physics. Knowledge."

In the past, when liberal arts and science were divided, students still took six subjects. After that, there were nine subjects. All kinds of knowledge were thrown back and forth every day, and my brain was really going to explode.

Thanks to her elf friends for helping her sublimate her brain, otherwise she would really have to sit in the study room every day to make up for classes, so she would still have time to manage the live broadcast. 】

Li Chengqian, who had been taught etiquette very well since he was a child, couldn't help but ask: What are these?

Li Tai shuddered. He thought the anchor's Chinese language was very simple before, and it was useless to annotate even a single poem. But today's geography has made his eyes go white. Looking at the mathematics, physics, and chemistry, he intuitively understood These three books are more deadly.

The people who were still wondering which of the hundreds of schools of thought the scientists belonged to looked at each other in confusion. Looking at the books with the colorful covers and the words "required" written in big letters, they all made a decision.

Since the guy named Zhang Sui can let the host play the stars, they can also let the host play the textbook!

Many emperors were scratching their heads when they looked at the book written with "history". They really wanted the anchor to talk about history, but they were worried that talking about their own dynasty would cause unnecessary turmoil, so they were very entangled.

Before the Song Dynasty, many people were interested in different subjects, especially children from aristocratic families who were tired of studying the written scriptures and wanted to read the colorful books with pictures.

After the Song Dynasty, when everyone looked at the above nine subjects, none of them were related to Confucian sages, and many scholars felt that something was wrong.

There are not many fools who would directly scold them. Most people would silently wonder why there is no Confucianism, or is it because the anchor is a woman, so they only learn these?

Zhu Yuanzhang, who was also studious, was also surprised: "Do the descendants of Marquis Wu learn these things?"

No, don’t you read any books by sages?

Zhu Biao thought: "Just the geography, you can already observe the stars and measure hydrology. What the descendants of Wuhou learned is no simpler than the Four Books and Five Classics."

A series of younger brothers behind him nodded in unison: Yes, Dad, it’s really difficult, don’t force us to learn.

During the Kangxi period, the princes who all studied in the upper study recognized the words in the 'English' book at a glance.

They don't understand that at special times in the Qing Dynasty, the children of the Eight Banners would be called upon to learn a certain Western language as a talent reserve. Why would future generations learn this and Chinese together?

Were the relations between the Han and the West so good in later generations?

[After showing his textbook, Xiaoxiao didn't mean to elaborate. Anyway, they will know what the content is after they finish the questions.

“The eighth lucky viewer, it’s your turn.”]

Eighth place? Who?

The lucky guy Shen Kuo who made the list twice!

Even in the Ming and Qing Dynasties, not everyone knew Shen Kuo, but basically everyone in the Zhe Zong Dynasty knew him. The old colleagues looked at Shen Kuo's name on it and felt very sad. They couldn't understand why this guy was so lucky.

Shen Kuo, who also felt very lucky, quickly bowed politely and asked: "May I ask the anchor, how are the longitude and latitude lines divided, and how do you identify them?"

He had been curious about this question for a long time. There were a lot of vertical and horizontal lines drawn on the balls in those questions. The people in front of him had asked the question he wanted to know the most. He also took the time to write it down. Now he could ask it with peace of mind.

["The division of longitude and latitude lines, wait a moment."]

Everyone under the canopy thought that the host would find another video for them to watch, but they saw her standing up holding on to the table, jumping a few steps to the side on one foot, and then pulled open the white cloth covering something next to her. As soon as your fingers moved on the big guy, the blue colored ball started to rotate slightly.

"That's...Earth!" This is someone who remembers what they learned today.

"Blue is the ocean, and other colors are the earth. Quick! Lang Guan, take a pen to record the map!" This is someone who realizes how useful this is.

"It's fun, I think I'm going to spin around for a while..." This is an ignorant child.

"The anchor's study really has everything..." This is someone who envies her for being able to study and study freely without having to worry about other things.

[Xiao Xiao turned to the prime meridian, pointed to this vertical line and said: "This is the longitude connecting the north and south poles. Where my finger is, it is the 0° longitude, also known as the prime meridian. From here, it is 180° eastward. It is the east longitude, E, and 180° west is the west longitude, W. One side is the eastern hemisphere, and the other side is the western hemisphere."

As she spoke, she slowly turned the globe left and right, and the system zoomed in so that everyone could see the numbers and text on the high-definition globe clearly.

"This is the latitude line. The largest circle in the middle is the 0° latitude line, also known as the equator. It is the hottest place on the earth. To the north is the northern latitude, N, and to the south is the southern latitude, S, each 90°. The southernmost one is the South Pole. The northernmost one is the North Pole, which are the two coldest places on earth."]

Shen Kuo instantly understood that because the earth is a ball, the equator is the most bulging and is heated the most, so the weather is hot. The north and south poles are heated less, so they are the coldest.

The Song Dynasty is in the northern hemisphere, so it gets hotter as you go south.

Combining the tilt of the globe with the shape of the earth in the previous question, he speculated that these two places should be bright half the year and dark half the year.

In addition to those who concentrate on studying, there are more people just watching the excitement, and those who think it will be useful sooner or later, so they try to memorize the map.

[Xiao Xiao pointed to a place casually: "This is Beijing, with 116°20' east longitude and 39°56 north latitude. The time used in our country is Beijing time. The sun rises in Beijing at six o'clock in the morning, but it may still be dark in Ili to the west. , this is the time difference."]

Beijing time?

The capital is Beijing's Ming and Qing people and Yourong Yan.

Several dynasties in the past: Is it so north, why is it not in Guanzhong?

Song Dynasty: Is this a location where we can go to the capital?

Liu Che: I think Chang'an time sounds better.

[Xiao Xiao covered the torn off cloth again, held on to the corner of the table and jumped back on one foot.

After holding on to the table and finishing her work, she took out her phone and opened some German map software.

"There is another good way to identify longitude and latitude lines."]