Hanyang, Linzhangshan School, and Hanyang Institute at that time from time to time Langlang book sound, here always seems quiet, only when the water clock is at the point, there will be the noise of children. Pen ~ fun ~ pavilion www.biquge.info

"Yesterday we studied Cao Chong's theorem, or the law of buoyancy, so does anyone remember what buoyancy has to do with it?"

Zhang De, who was standing with his hands in his hands, looked at the students of different ages, some of them were brought from the Dahe Workshop, some were brought by the West Lecture Hall of Chang'an City, and some were the children of the sect......

The number of students is not enough to teach in different classes, and in the club, they are divided into three grades, which are just basic knowledge, but they have little to do with age. There is no difference between the law of buoyancy learned by a seven-year-old child and the law of buoyancy learned by a seventeen-year-old child, and there is no difference in the depth of understanding. They only exist whether they digest, whether they receive, whether they diverge.

"It's just about the volume of the liquid discharged and the density of the liquid."

"And the volume of water, the density of water ......"

"Density and volume."

……

Answering in a mess, Zhang De did not stop it, and heard the answer, there are right, some are wrong, and some are very different, the difference between seven and seventeen years old.

"You are now wondering, how can you determine the density of matter? This is what you have been wondering about. When I was in Chang'an, there was a man named Yu Chihuan, who often asked me about this. Then one day he made a cube mound of earth one foot long, one foot wide, one foot high, and weighed the weight of the mound, and he got the density of the mound. ”

Zhang De looked at the schoolboy with a surprised face, "However, one day, he took another pile of soil and remeasured it and found that the data did not match." So, here comes my question, why? ”

After a pause, someone asked, "Is it that different soils have different densities?" Or is it the wrong way to measure density? ”

"The way of measurement is correct, if the density of matter remains the same, then what we see in our daily life, the volume of matter increases and also increases, which shows that it makes sense."

"Then the matter is complex, just like Mr. said, the density of the Yellow River water and the Yangtze River water is different. My family has been to Qinghai, and I heard that there are some salt ponds there, and people do not swim in them. ”

Seeing them discussing there, Zhang De smiled: "Wei Chihuan's method is not wrong, this is also the simplest and easiest method, but this is only suitable for the substances that we can control under the current conditions." Density, which we can simply understand as the mass within a unit volume. The reason I've left density for now is to introduce something to you. ”

As he spoke, Zhang De took out a special ruler for China Resources Firm, and took out a fair scale for China Resources Firm, which was a balance.

"Metrics."

As the water bell rang, it was already time for a lunch break, and in addition to eating, there was also a lunch break. Whether it is the year of Zhenguan or the year of Wude or the thousands of years ahead, "day sleep" is a rather lazy thing and will be criticized by the people of the time.

But in Linzhangshan Academy, the lunch break is a nap, which is something that is encouraged but not forced. In addition to the matter of napping, Linzhangshan also has an anti-trend thing, that is, providing lunch for students.

Normally, this was the standard of living only for nobles and officials. In normal people, there is only one morning food, plus one supplement. The output of land is not enough to support the whole society to eat three meals a day and cook every meal. Supplemental food is just to eat the leftover from the morning food and then take it to eat.

"You are the governor of the state, and you actually came to teach? Do you have what it takes? ”

"Do you care if I'm qualified?"

Lao Zhang squinted at Li Desheng, this guy is getting darker and darker, running back and forth on the construction site, after the autumn harvest, he will start to seize the time to intercept the swamp and drain the silt, one winter should be enough. Here in Jingxiang, it is not easy to find thick ice in winter.

"By the way, why didn't the Japanese slaves last month come to Hanyang?"

"Sent to Jiaozhou."

"What is the use of Li Daoxing's old horseman? These Japanese slaves are used to reel silk and open rivers, which are all political achievements! For the mother, I prepared 5,000 yuan, ready to go to the door of Keming Gong, and others would not dare to provoke my uncle. ”

"At present, we have to wait for the mulberry fields to mature, and besides, the number of people who have migrated this year is a bit large, and the Japanese slaves are not needed." Zhang De picked up a chicken leg and gnawed it, and ate it very presumptuously, and said to Li Desheng while eating, "The prince of the Gundam Kingdom will pay tribute next year, and there are a lot of spices and yellow scarves in Dongtianzhu, I heard Li Chunfeng say that there is also a big silver mine found in Jiandala." ”

"Big silver mine, how big can it be?"

"It's so big that there are gold, silver, copper, iron, lead, coal, ......," Zhang De glanced at Li Desheng, who looked sluggish.

I saw Lao Li throw the ribs in his hand violently, and his eyes widened, "How did Li Chunfeng's stinky Taoist priest find out?" ”

"That silver mine, listening to his description, is probably in the southwest of Jiandra, and inside the mine, there is actually dense open-pit silver, and the scale should be dozens of times that of the Fengzhou silver mine."

"Mother's!"

Slammed the table, "At this time, I don't have much strength to go to Bolu." I heard that Khotan is still reorganizing the army, and the Western Turks have increased their troops in Shule, and the beasts of Fengzhou want to mix up the position of the protector of the capital of Anxi, but whether the court will use troops or not, they are all two words, and it doesn't count if they use troops after 30 years. ”

"This matter has been rumored in Chang'an, not by Li Chunfeng, but by the last businessman."

"People who have lost their country will do things, but I am afraid that they have bad intentions."

Of course, it is ill-intentioned, and if you use troops at this time, it is unjust. Even if the sergeant is good at fighting, he is afraid that he will not accept it after the war. Moreover, the three states are not stable, and the princes and nobles at the end always have fish that slip through the net, if it is a knife in the back, the army will move forward, it is a risk. A few years of operation is ruined, what is the use of an erosive Shazhou in Datang? ”

"Tell me about the silver mine."

Li Desheng picked up the ribs again and took a sip of wine.

"In the northeast of the silver mine, there is a coal mine, which is not big, but it is an open-pit coal mine, and the coal is brown, which is considered to be of the highest quality." Zhang De said, and said, "Poly Construction went to a few big workers, and found that some clay is not bad in texture and can be used to make porcelain. ”

"You can't bring soil back to China, can you? Is it difficult to fire without success? ”

"Not right now, if it is fired, sooner or later the means of burning porcelain will be revealed."

Zhang De took a bite of rice, and after swallowing it, he hesitated a little, "It depends on whether the imperial court will use soldiers or not next year, and if it uses soldiers, it will take away those Turkic slaves in the Dahe Workshop." ”

"All?"

Lao Zhang shook his head and lowered his voice and said, "I have said something to Li Liangzhou, although Zhuqiang is terrified of the Tang Dynasty at the moment, but the territory is so big, there is so much food, and there will always be deaths." Now, some large tribes have to destroy small tribes to stabilize the clansmen. ”

"What do you mean?"

"The Qiang people are willing to act righteously and release horses for the Tang Emperor."

"Where to put the horses? Boru's? Gandhara's? ”

The two have a tacit understanding, and with just these three words, Li Desheng knows that Zhang De's conscience is very bad. If Li Daliang goes down in one sentence, how many people have to fall into blood mold?

Breaking the county order, destroying the door order Yin, that's a fart. The governor of Liangzhou didn't do anything, and the Qiang people themselves started the business of selling people of their own clan, and they were very excited and diligent.

"You used to be a horse, you are a Qiang fart, you are still a horse......

Li Desheng shook his head, still a little unsure, "What can the Qiang people do when they get to Bolu and Kendra?" ”

"A flock of sheep is to drive, and two flocks of sheep are to be grazing. Since they all let Ma Bolu go, it is better for the Bolu people to let Ma go west and go south. ”

“……”

For a time, Lao Li put Italy ...... noodles were brought out for Lao Zhang to taste.