Datang started from being a salted fish

Chapter 68 Hot Air Balloon

"Yo, the emperor is here. Who is this?" Wang Yin greeted Li Shimin.

"This is Guozijian Jijiu, Dr. Kong Yingda Kong." Li Shimin introduced.

"Doctor? So hung up?" Wang Yin muttered in his heart.

"Hmph, I thought who bewitched His Royal Highness King Wei, so it was you, General Wang." Kong Yingda said dissatisfied.

"Uncle Kong, why do you speak so badly at such an age? What's the temptation?" Wang Yin asked.

Li Shimin held his forehead: Sure enough, this is very Wang Yin. . .

Qin Huaiyu was fine, Li Chengqian and Li Tai brothers saw Wang Yin being so jealous of Kong Yingda, they wanted to laugh but didn't dare to laugh, they shook their shoulders. . .

I couldn't help but sigh in my heart: I really deserve to be Brother Yin. . .

"You...forget it, I don't care about these things with you, a rough man." Kong Yingda glared at Wang Yin: "What kind of science does His Royal Highness Wei Wang talk about, but you taught him?"

"Yeah, what's wrong?" Wang Yin asked doubtfully.

"I just heard you say that the earth under our feet is a ball, and all of us live on a ball?" Kong Yingda flicked his sleeves: "It's just nonsense!"

Wang Yin curled his lips: "People in our side used to think the same as you, thinking that the sky was round, and then there was a navigator who sailed in one direction. It took three years, and finally the ship sailed to the starting point, which proved that the earth is round. It's round."

"It's nonsense." Kong Yingda insisted on his point of view.

"It's an interesting story." Li Shimin said, obviously he didn't believe it either.

Li Tai didn't speak, but his eyes were shining brightly. . .

"For example," Wang Yin took out a boiled egg and put it on the table, "Which of you can stand it on the table."

After hearing the words, everyone tried one after another, but finally gave up.

"This is simply impossible." Kong Yingda said while blowing his beard.

"Crack!" Wang Yin took the egg and knocked it on the table, and the egg stood firmly on the table.

"Just because you don't know, doesn't mean he doesn't exist. Many times, when you look at a problem from a different angle, you can easily solve it." Wang Yin said lightly.

At the same time, I thought in my heart: This is a force, I will give myself 86 points!
"If it's true as you said, if we are on the same ball, wouldn't the person on the other side fall off?" Kong Yingda said, poking her neck.

"This involves another term 'gravity'."

"What is gravity?" Kong Yingda continued to ask.

"Gravity, also known as gravitational force, refers to the tendency of objects to accelerate closer." Wang Yin read according to the search results: "The earth's attraction makes nearby objects fall to the ground. Gravity is the reason why galaxies such as the solar system exist... ..."

"What is the solar system? What are celestial bodies? What are tides?" Kong Yingda asked dazedly.

I'm sorry, sir, your question is beyond the outline. . .

"Ahem, it's too early to talk about this now, let's talk about some basic things." Wang Yin quickly used the method of changing the subject to cover up his ignorance.

"When we talk about gravity, we have to mention buoyancy." Wang Yin regained the expression of the old god: "To give the simplest example, the boat can float on the water because of buoyancy."

Wang Yin's explanation was easy to understand, and everyone nodded thoughtfully.

"Actually, there is not only buoyancy in the water, but also in the air." Teacher Wang went online again.

"What is air?" Kong Yingda couldn't care less about finding fault with Wang Yin, and was completely attracted by Wang Yin's topic at the moment.

"Air is all around us, but we can't see it. We usually breathe air," Wang Yin said.

Seeing everyone's confused looks, Wang Yin decided to do another small experiment.

Wang Yin took out a glass water jug ​​and asked Qin Huaiyu to fill more than half of it with water, then took out a glass cup, tore a piece of paper from his notebook and stuck it in the bottom of the cup, turned the cup upside down, and pressed it vertically to the bottom of the water , the water directly covered the bottom of the cup.

"What do you think of the paper at the bottom of the cup?" Teacher Wang asked, looking at the crowd.

"Of course it's wet." Everyone looked like the question was simple.

"Really?" Wang Yin took out the cup vertically, took out the piece of paper stuck in it and handed it to them: "Try it yourself."

"It's not wet?" Li Shimin asked in surprise after touching it.

The remaining four touched it in turn, and they were all shocked.

"This cup seems to have nothing in it, but it is actually filled with air." Wang Yin shook the cup in his hand and said, "Let's look at it later."

Wang Yin pressed the cup vertically into the bottom of the water tank again, and then tilted the mouth of the cup a little.

A bubble immediately popped out from the mouth of the cup.

"As you can see, this bubble is air." Teacher Wang explained.

"It's amazing, it turns out that we are surrounded by this kind of thing called air." Everyone couldn't help sighing.

"Yes, the air is closely related to us. What we usually breathe is the oxygen in the air." Teacher Wang continued the class: "For example, if a person's nose and mouth are blocked, the person will suffocate to death because he cannot caused by breathing oxygen."

When Wang Yin said this, everyone suddenly realized.

I used to only know that people will suffocate to death, but now I know the reason for suffocation.

It turned out that he couldn't breathe oxygen.

"Usually when you cook and make a fire, you also use oxygen. If there is no oxygen, the flame will go out quickly." Wang Yin continued, and then poured the water in the glass water tank onto the ground.

"Let's do an experiment and you'll understand." Wang Yin took out the alcohol lamp and lit it: "Look, now the lamp can burn normally."

Everyone nodded subconsciously.

Then Wang Yin put the glass water jar upside down on the alcohol lamp. There was no change at first, but after a while, the flame became smaller and smaller at a speed visible to the naked eye until it went out.

"I understand. This is because the torch burned up all the oxygen in it. Without oxygen, the fire will go out." Li Tai was the first to react.

Wang Yin had to sigh: he deserves to be a top student, he is a bull!
Everyone suddenly realized and nodded.

"But, brother Yin, didn't we just talk about buoyancy?" Li Tai made a sudden strike.

"Ahem... I introduced air to help you better understand buoyancy." Wang Yin coughed quickly to hide his embarrassment.

Made, accidentally went astray. . . . . .

"Now that you know the existence of air, it is relatively simple to explain buoyancy." Teacher Wang continued: "A very light object, such as a feather, will slowly fall in the air instead of falling down all at once. It's buoyancy."

"Why can birds fly but people can't?" Li Xueba asked again: "Is it also because of this buoyancy?"

"Hmm..." Wang Yin touched his chin, pretending to organize his words, and quickly opened the search to search.

Ma De, the most hated is the bully, I feel like I can't hold it anymore. . .

"This is caused by many reasons. I can't explain this knowledge to you in a short time, but you will know when you learn it in the future." Wang Yin looked at the answers he searched and didn't bother to read.

The ghost knows what kind of heart-wrenching questions he will ask after finishing his studies. . .

"Ahem, although we humans cannot fly by ourselves, we can rely on external forces." Wang Yin quickly changed the subject: "Learning and using tools are our strengths."

"You mean, we can use external force to fly?" Li Shimin grasped the point at once.

"Yes." Wang Yin nodded.

"How?" Li Shimin asked hastily.

The others also looked at Wang Yin expectantly.

Flying into the sky has always been the dream of human beings for thousands of years. Now that they heard that they might fly, they were extremely excited.

Wang Yin searched in the mall, and after a while, he found what he wanted.

Hot air balloon: 100 sticks/piece (limited to 4 people)
Just you!
(End of this chapter)