"Everyone, we've arrived, this river is called the Dongfeng Canal!" Wang Meng said as he asked everyone to get off the train.

When everyone got off the train, they saw a familiar figure.

This person is Li Ke, and I saw that he was wearing a frame on his head, which was actually more like a hood, covering half of his head.

In front of him there was something that looked like a fish.

Li Jing took a closer look, this thing was huge, and there were iron lumps that five or six strong men might not be able to hold it.

Could this be what I saw in that yard before? Li Jing asked, "What is this?" ”

"It's called a submarine!"

"Submarines? What is it used for? Li Jing asked curiously.

Li Ke: "It's like a ship, but it has more functions than a ship. ”

Li Jing patted it again, confirming that he was not wrong just now, and the thing in front of him was an iron lump. "It's not wood, it floats on the water like a boat?"

"Excuse me! Why can fish float on the water? Li Ke did not explain directly, but instead raised a question.

"Because fish live in water, it's okay?" Sunan Song was the first to speak.

"Fish can float on the surface of the water, that's nature, just like us humans can walk." Li Jing explained.

Li Ke smiled, shook his head and said, "No, no, no!" The fish can float on the surface of the water because it has a swim bladder, which is what we often call a fish bubble. When a fish wants to float, the swim bladder will expand, so that the volume will become larger, which is equivalent to you have another small room, which contains a lot of things, and you have two ways to make the remaining space larger, one is to take out all the things, and the other is to expand this room. The fish chose to enlarge the room, and at this time the weight of the fish was smaller than the proportion of the river water, and the fish were naturally able to float on the surface of the water at this time. ”

"You've been talking about this for a long time, but you still haven't said why this iron lump is floating on the water." Grandpa Gui said.

"Listen to me slowly, my submarine is like a fish, there are many small rooms, but the first way is to release the water in the small room, and you can float on the water." Li Ke explained.

"I don't understand what you're talking about, but I know that nothing but wood will float on its own if it falls into the water." Li Jing insisted.

You don't understand and don't listen! What logic for you!

"Why can that wood float on the surface of the water if it's not a fish?" Li Ke asked.

"That's because the wood is light!" Li Jing said confidently.

Li Ke seemed to smile, and then said: "It's not because it's very light, it's actually related to the density of things, but now I tell you about this density, you probably can't understand it, then I want to ask, is the trunk of a whole tree heavier or the weight of a small stone heavier." ”

"Nature is the trunk!" Grandpa Gui said.

"That's right! The trunk is heavier, but if you put a lighter stone and a heavier trunk in the river at the same time, why does the stone sink, but the wood does not? Li Ke asked rhetorically.

Faced with Li Ke's question, everyone was a little puzzled, but they couldn't explain the reason.

Li Ke said triumphantly: "So let's say! Many things don't exist but you don't know, and then the previous one, Master Wang thinks that it is because the wood is relatively light and can float on the water, we assume that it is really because of this reason, so we use a lot of wood to cause this thing in front of us, can he also float on the water? If I use something else, like what you see right now, iron! But is it supposed to be able to float on the water, as it weighs like wood? ”

Everyone was almost persuaded by Li Ke, except for Li Jing, of course.

He still thinks that Li Ke is doing evil magic, just like the things in the closed courtyard before.

At this time, no one noticed that Su Nange looked at Li Ke's expression.

His eyes were full of adoration, and he almost wrote it on his face.

It seems that this Li Ke is not useless, and the problems he talked about seem to be real but we have never considered them.

He's an interesting guy!

"Lord Wang, with all due respect, you are talking nonsense, what you just said about wood, iron, stone or something, they are all different things, whether they can float on the water is not up to you, but innate, so these are not human, I advise you not to study well." Li Jing's face couldn't hide the gloom.

"Master Wang! The words can't be said so absolutely, that's a little ......" Li Ke's words were interrupted by Li Jing before he finished speaking.

"Don't bewitch the people here, you, as the king of a land, study these crooked ...... every day If you don't get something practically, I'm afraid you won't be able to realize your so-called vision. Li Jing wanted to scold, but outsiders were present, and he didn't show his identity, so he finally held back.

In my heart, I have already scolded this rebel who messes with prostitutes all day long and studies crooked ways thousands of times.

Li Jing saw that this old stubborn couldn't make sense no matter what he said, so he couldn't help but curse a few words. "Eh, Master Wang, you are short-sighted, how can you still stubbornly think that I am a crooked and evil way? Haven't you seen an elevator or eaten stir-fry before you came to my Yizhou City? One must always learn to accept one's own ignorance! ”

"You ...... Young people, don't speak wildly! The old man is older than you, and people still have to follow the right path! Li Jing was not to be outdone.

Why am I not on the right path? You old horseman!

"Isn't it right for someone else to do something beyond your knowledge? Master Wang, this is not right! Li Ke said in a weird way.

Sunan Ge was a little happy when he saw Li Jing eating deflated at his son's place, and he admired Li Ke more and more.

also helped: "Uncle, don't talk about it!" ”

Gonggong Gui on the side was already so nervous that he was sweating, and the last time he saw such a tense scene was in the palace.

The gods are fighting and the people are suffering, can you father and son let me go!

"Lord, didn't you say you wanted to visit us? Miss Su has been looking forward to it since last night. Father-in-law Gui hurriedly changed the topic.

This treacherous and cunning thing who is looking forward to it!

Sunan Ge smiled and didn't speak.

The scene was a little embarrassing for a while, Li Ke pretended to have an uncomfortable throat, coughed dryly twice, and then said.

"Master Wang, I really don't do any witchcraft, these are the laws that exist in nature, just like people are still hungry after eating, it's just that there is a lack of people to find out, Xiao Wang also likes to tinker with some things on weekdays, and found it by accident. It's not sorcery. ”

Li Jing saw that Li Ke's tone was much softened, and he didn't talk about it, but he still didn't trust Li Ke very much in his heart.

"Since that's the case, please show it to us!" Li Jing also calmed down and said.