Chapter 248 Liu Ying Palace Hemisphere Experiment
After taking back several hemisphere shells from the hands of the students, the people next to them began to perform some operations that the students could not understand. First, they filled the several hemisphere shells with water and put them together. Then they used a device they couldn't understand to pull the water out of the ball...
Could it be that after doing this, the several hemispheric shells could not be separated from each other? If so, why is it like this?
The students were doubtful and puzzled. The people next to them seemed to know that they were curious and confused. They handed the two balls together and asked them to try again to see if they could separate the balls.
However, this time, unlike the previous time when they could easily separate the balls, they used a lot of effort and failed to re-divide the two balls into four hemispherical shells.
But why was it that when those people were operating these two balls, they kept watching and didn't seem to perform any very special operations, such as filling the ball with water, combining the ball, and pumping the water, and then they couldn't get the ball open?
This aroused strong interest among the students. Today they no longer believe in evil and cannot separate the two balls.
At this time, Li Nian's voice came: "If you feel that you are not enough people and have insufficient strength, you can find other people to pull the ball apart. The buttons on it are used to fix the rope."
The people next to them also handed the ropes to the students at the right time. The students tied the ropes to the buttons outside the ball shell and invited others to pull the ball together.
The students were gearing up and arranged more than ten people on both sides of each ball, which is equivalent to more than twenty people pulling out a ball at the same time. This wave will definitely separate the two balls!
Watching the students pull out two balls again, the teachers accompanying them sighed. They had also seen Li Nian letting people do this experiment, and some of them had even participated in it personally.
Before, like these students, they had never thought that the two balls, which were joined together by hemispherical shells, would be so difficult to separate, and the strength required would be simply outrageous.
Things in the world are indeed as Mr. Li Nian said, strange, divine and strange. Many things are not what they thought, nor what the disciples thought. Who would have thought that this ball would be so strong? It's because of the invisible power of air around them.
The students began to pull out the balls, using the greatest strength in their lives. Unfortunately, the two balls still did not move at all. No matter how hard they tried to drink milk, they still remained motionless, with no sign of separation at all. .
The students were shocked. There were so many of them and they couldn’t separate the two balls?
It must be that the strength is not enough to separate the two balls, so they continue to add people, and dozens more people are added, but they still cannot be separated, and more people are added, but they still cannot be separated...
Until The number of people has increased to 100, but they still cannot separate the ball.
Some students have begun to wonder if those people have tampered with the ball just now. Otherwise, why would so many of them be unable to separate the ball?
Seeing that the students were unconvinced and wanted to continue to add people to pull the ball, Li Nian said: "Stop, put the rope on the horse!"
Li Nian said, they could only He obeyed the instructions honestly and watched as the rope on one of the balls was tied to the horse, then he realized that these horses were used for this purpose.
At first, three horses were tied to each side of the ball. A total of six horses started to pull the ball, but unexpectedly, even six horses failed to pull the ball.
More horses were added until there were six horses on each side, a total of twelve horses, and then the ball was finally pulled away. There was only a loud "bang!" sound, and the copper ball was separated. .
Looking at the twelve horses standing on the field and the two hemispheric shells falling on the ground, many students looked surprised, confused and curious. It took the twelve horses to move. No wonder they couldn't do it. But why does it take so much effort to pull this little copper ball apart?
It is obviously just two hemispheric shells put together, and it is not a completely forged solid copper ball. It should be easy to separate.
Is it just because of what those people did when they put the ball together? But what truth does that contain? This was really fun, and it was beyond their expectations!
Li Nian held another copper ball that had not been pulled out in his hand: "Some people may be wondering whether there was some manipulation when the ball shells were put together, making it difficult to separate the ball shells? ”
“But in fact, there was no manipulation. If not, "Xin, can you come and take a look at this undivided copper ball in person? What's the difference between it and the separated one?"
Li Nian said and unscrewed the air nozzle on the ball. , the ball that was difficult to separate in the hands of the students suddenly split into two hemispheric shells.
A group of students put the four hemispheric shells together and observed them, and found that they were not much different from what they had seen before. There were no special mechanisms or devices added.
Since no special tricks were done, it must be adding hydration balls, and then pumping water would be weird, and water played an important role in it.
A student asked Li Nian for advice: "Excuse me, Sir, from my perspective, this ball is not special, why is it so difficult to distinguish?"
Li Nian smiled and said: "Actually, the ball is The difficulty lies not in itself, but in the air everywhere around us, which exerts a huge force on the ball, like two arms pressing the ball shell firmly together."
A student asked: "Since there is such a huge force, why can't we feel it?"
Li Niandao: "This kind of force can be called 'atmospheric pressure'. It is invisible, so It’s invisible to the naked eye, but the reason why we can’t really feel it is because the pressure in our bodies is balanced with the atmospheric pressure outside, which is equivalent to nothing to us.”
"But in fact, it is almost everywhere. For example, when we exhale and inhale, and there is wind between the sky and the earth, it is all related to atmospheric pressure. Even when we light a fire and boil water, it is also related to it."< br>
Another student seemed to understand something and said: "Just now we were able to put the ball into the shell The easy separation is actually due to the balance between the pressure inside the spherical shell and the external atmospheric pressure. "
"But after filling the spherical shell with water and then pumping out the water, this balance is destroyed and the ball becomes The pressure inside the shell weakens or even disappears, and the effect of external atmospheric pressure naturally Appeared on the ball. "
Li Nian glanced at the student who was speaking and said, "That's right. The purpose of filling the ball with water is to remove the air in the ball shell, but the water in it will still produce the same effect as the outside world. phase equilibrium pressure, so the water must be pumped out later so that there is no void inside. There is no air or water. Only in this way can the power of atmospheric pressure be revealed!”
All the students nodded repeatedly. It turns out that this is what happened. It would be so magical if I hadn’t seen it with my own eyes today! Experience, how could they have known that such interesting things existed in the world?
Li Nian continued: "Some of you may be wondering what is the use of learning this and knowing this? It seems that you can't see the practical use, but in fact it has many uses."
"If you can Observe the weather better. There will be strong winds along the coast, flooding will occur wherever you pass, and trees will fall down and houses will be destroyed. If you can know in advance, please inform us. Wouldn't it be possible to reduce losses if we know it? If we go to certain dangerous areas and find that the danger is related to atmospheric pressure, we should also know how to deal with it. If we want to fly in the future, we should also know the atmospheric pressure and have a lot of dealings with the air. .”
(End of this chapter)