Fan Jingjing, who was surprised, opened her mouth wide and looked at Li Shimin in disbelief, thinking that she must have heard it wrong.

It's not for other reasons, but Li Shimin's request is too mysterious.

Fan Jingjing feels that she is an ordinary person, at most an ordinary beauty.

She doesn't have this kind of ability to call the wind and rain.

Then she remembered her water balloon, after this period of use, in fact, she already knew that the energy of the water ball would actually decrease, the energy value of the water balloon, and the energy value of her Maserati, it depended on the spiritual energy value of his body.

When her physical condition is good, when her mental state is good, all her energy values are full.

But if you want to be mentally full, you must have a balanced diet.

After coming to Datang, Fan Jingjing no longer had the means to eat meat for meals, and took into account the balance of all nutrients.

Some are good to eat, but as for the good things, they have to be taken out and sold.

Trying to control the changes in the water balloon will drain her mental energy.

Mental energy is overdepleted, and it cannot be replenished by sleeping, and nutritious food must also be eaten.

"Your Majesty, Weichen is an ordinary man, and he can't call the wind and rain."

Fan Jingjing resisted the urge to wipe her sweat and replied.

She didn't know what to say that would offend the emperor and be beheaded, but she felt that she was still telling the truth, and the only truth she couldn't tell was the emperor's bad words.

Fan Jingjing can get some breeze and drizzle in other places, but if it doesn't rain for a long time, it will not help the local area.

The rain she brought in from Fan's Manor often drove the water vapor from the vicinity, and then caused the concentration of saturated water in the place to change, and then turned into clouds and rain.

She could feel the changes in the water vapor around Chang'an, and unless she went to the beach to collect a stream of water vapor, there was no way to solve the drought.

However, going to the beach to collect water vapor, not to mention whether she can do it, the risk along the way is very large, Fan Jingjing knows that the order of Datang has not been completely stabilized, even if it is completely stabilized, there will still be no shortage of bandits and bandits, and in places that cannot be managed by the government, the order of the people is the same, very chaotic.

Of course, many people's lives are at stake, if someone protects her to the beach to draw water, without hindering her own life, Fan Jingjing is actually willing to help.

However, Fan Jingjing knows the reality better, even if she wants to bring the water in the air, the spiritual power consumed must be very large, and the water that can be diverted must be limited, the question is where the specific limit is, without detailed calculations, Fan Jingjing doesn't know, she just vaguely knows what she can do.

Fan Jingjing estimated that if she saved the drought elephant in Guanzhong, she would lose half her life if she didn't die, although she knew that the Tang people were more or less his ancestors.

But it's not the people she knows who have problems, although she will maintain a little sympathy, but she doesn't have the spirit of guarding with her life for the people of Datang.

Just one or two people, that's the duty of the common people.

It is the duty of the imperial court to save the people of the whole country, and she believes that since the imperial court has collected money, it should protect the people under her.

Fan Jingjing's idea is estimated to be a big rebellion in Datang.

Maybe it's because when she arrived in Datang, not everyone wanted to help her when they saw her, so she was still a little estranged from this era.

"If you can't call for wind and rain, how can she explain the problem of frequent rain in the Fan family's manor?"

Fan Jingjing naturally prepared a set of statements.

"Your Majesty, do you know why it's raining?"

Fan Jingjing felt that he had to explain it clearly.

"Thunder, rain and dew are all heavenly graces. It's just that the people will suffer in the case of more or less, and they can't help but have to intercede with God. I am the Son of Heaven, and although I have descended to earth, I have set an example for all the people, and I should lead the people to ask for mercy on the behalf of Heaven. ”

Fan Jingjing does not have the consciousness of the people of this era, let alone go out of the society to accept the test of society, I don't know if what is said above is right, wrong or right.

When she was a student, she was high-spirited, and most of the teachers would be more considerate because of her family background, and she never felt that there was anything wrong with her work.

"The Son of Heaven is above, but this statement is fallacious."

If Fan Jingjing wants to promote the basic knowledge of nine-year compulsory education, she must crack some superstitions.

In future generations science also coexists with faith. Even the development of science was to show divine grace from the beginning. It's just that later, scientists moved too fast about science, so they didn't accept some psychedelic things, but even the greatest scientists still couldn't explain all the phenomena, and there were still some people in their hearts who had faith.

It's just that faith needs to be reinterpreted!

"Your Majesty, rain is formed by clouds made up of small droplets."

Li Shimin thought for a moment, nodded and said, "I know." ”

There are many truths, although he usually has no time, but he deals with so many businesses in the world, he actually has some understanding of the rules of the world, but he doesn't have time to think about it. When someone else puts forward an opinion, he will do the simplest logical thinking to determine whether what the other person said is correct or not.

Although no one had ever told him such systematic knowledge before, after careful thinking about it with Yun, he was able to quickly understand it and nodded his head to admit it.

Fan Jingjing didn't pay attention to what kind of reaction Emperor Li Shimin had, she just wanted to find a way to pass on the knowledge that she would know in the previous elementary school to others, you must know that this knowledge is not difficult to understand, if you want artificial rain, you must also start from these basic knowledge.

Fan Jingjing has no way to make artificial rain, but there are so many smart people in this era, if they know the basic attempt, maybe they will find a way to make artificial rain. However, if you want to create artificial rain, the most important thing is to have rain clouds, but now in the sky over Chang'an and even Guanzhong, there is a lack of large clouds, and there are no conditions for artificial rain, but there is no today, which does not mean that there will be no days in the future.

"Whether it rains or not depends not on God's instructions, but on the change of high and low pressure.

Whether clouds can fall depends on the formation of a large enough amount of raindrops in a short period of time.

There are two ways in which water droplets in clouds form raindrops.

One is that the water droplets in the cloud continue to condense and become larger, and the other is that the water droplets in the cloud collide with each other so that the water droplets in the cloud combine with each other and become larger.

But either way, there must be water droplets. This involves the amount of saturated water vapor at the time.

The saturated water vapor content is related to the temperature. ”

Fan Jingjing said while reminiscing, thinking about the power of the water balloon in her hand.

She was able to control the amount of saturated water vapor, which meant that he could know the temperature of the air nearby. But he didn't feel the change in the temperature in his neighborhood.

If it can affect the temperature change in the vicinity, it means that the cultivated land of the Fan family manor is out of the temperature control of the four seasons.

In this way, Fan Jingjing can adjust the temperature according to the needs of production.

Although he was recalling his thoughts in his heart, half of Fan Jingjing's attention was still on answering the emperor's question, after all, the head above his neck was still very important.

Fan Jingjing hopes that the emperor can create and invent a solution to the problem from the understanding of principles and principles, after all, there are so many geniuses around the emperor, and these geniuses are responsible for coming up with solutions for the emperor, if they have no way to solve difficulties for the emperor, how can they have the opportunity to be by the emperor's side?

She knew that these people had a lot of staff around them.

For the dignitaries who can leave their names in history in this era, in fact, she is also very curious, but unfortunately no one helped her introduce her at this time, looking at the bearded old uncles, she really doesn't know who these people are.

However, it can be seen that these people are all civil servants, and none of them are military generals. The civil servants and military generals of this era are not even the same in their clothes, and they are quite easy to distinguish.

Unlike later generations, who wore civilian clothes to work, without a uniform, it is difficult to determine what identity this person has.

Fan Jingjing has been educating children, and she doesn't know much about Chang'an officialdom after all. So I haven't heard of which official has what kind of appearance and personality.

For Fan Jingjing, the characters that appear in history textbooks are a noun, not a specific object of gossip.

"When the weight of a water droplet is too heavy for an updraft to hold it, it falls down and rain is formed.

In fact, it is very difficult for a water droplet to become a raindrop that falls enough by simply condensing itself.

So if there are clouds in the sky, people can use artificial power to make the water fall in the sky. ”

Li Shimin's brows furrowed, he had never heard such a statement. He looked at the blue sky and asked:

"Is there any way to get the moisture from the clouds to fall to the ground so that people can use it?"

Although it was difficult to accept the idea of clouds floating in the air, she could barely accept the thought of something like a paper kite.

"Sprinkle condensation nuclei in the air to increase the rate at which clouds condense."

"What is condensation nucleus? And how do we get to the skies? It's just nonsense. ”

In Li Shimin's mind, there has never been an example of anyone flying into the sky, and those who can go to the sky are still mortals? That must be an immortal? Even the emperor could not deny the existence of immortals, otherwise there would be no need for religion to exist, and when the emperor was old, he would not be obsessed with praying to God and worshiping Buddha.

"You can fly in the sky...... It's hard to get into the sky in this day and age, but you can still go up in a balloon, right? Fan Jingjing worked hard to come up with a solution.

At this moment, it suddenly occurred to her that it didn't seem good to continue, so she turned the subject back. I hope Li Shimin will forget the middle paragraph.

"In the process of rainfall, the original size of the raindrops in the cloud layer is not equal due to the different sizes of the condensation nuclei and the different sequences in which the condensation occurs.

As the water droplets continue to grow and descend in the air, they will continue to be subjected to various effects, sometimes they will evaporate again and disappear again, and then they will return to the air, and sometimes they will connect with other water vapors and become larger, increasing the force of their downward movement.

Rain may move vertically several times as it falls, which is related to the strength and weakness of the updraft. If the clouds contain less water vapour, then rain cannot form.

Not all water droplets can fall to the ground, or even reach the ground, and sometimes the fog around us is an important reason why the water is low and there is no way to form rain.

If rain does not form, it is much easier to simply let the water vapor in the air form water droplets.

"I wonder if the emperor has ever drunk cold drinks in summer?" Fan Jingjing's question was actually just a hypothetical, she didn't think that the emperor was not in a condition to use ice, so she continued: "When you put ice cubes in the container, you will notice that the ice cubes will form condensation vapor. So there is a way to make the air colder, and it can also squeeze out the water vapor in the air. These are the two methods proposed by Wechen.

These two methods were not easy to do in the siege, and the emperor had to find a way, either to scatter condensation nuclei in the air and to make the air cold, to squeeze out the water vapor, and to moisten the earth. ”

"Why does it rain regularly at Fan's Manor?" Li Shimin was not moved away by Fan Jingjing's topic, and still clung to this question.

"In the process of running, warm air encounters the obstruction of the terrain and is forced to climb along the hillside, which will slowly become colder, which will cause water vapor to condense and form precipitation, which is called terrain rain.

Topographic rainfall occurs on the windward side of the hillside.

The place where Fan's Manor is located happens to be a trumpet, and the wind just makes this trumpet just meet the wind at this time, and it just forms a burst of terrain rain in our cultivated land.

In our land, the winds are different at all times. The winter wind blows down from the north, the summer wind blows up from the south, and this time is spring, the wind is relatively unstable, if the cold air mass is stronger, the wind will come down from the north, if the warm air mass is stronger, it will blow up from the south, and when the intensity of the cold and warm front is about the same, a kind of retention front will be formed, resulting in continuous spring rain.

This time there will be a drought, the most important thing is that the wind has not formed. The power of the south wind is suddenly stronger.

It could be a sunspot outbreak of the sun......"

The more Fan Jingjing talked, the more excited she became, and she was able to fully treat other people as primary school students. I felt that I was the greatest teacher in the world at this time.

However, the ministers and Emperor Li Shimin were at a loss at this time, and they didn't know what Fan Jingjing was talking about.

Every noun that Fan Jingjing confides in is a proper noun that needs to be learned, but because of the education they have received since childhood, they have become very familiar with these nouns. Familiar with Fan Jingjing, everyone should know.

Just like people in this era, they are very familiar with official positions and the names of various big masters, but they are very unfamiliar to Fan Jingjing.

This is a consequence of the different fields of life.

However, Fan Jingjing finally realized that everyone's eyes didn't seem right.