Building infrastructure in the wizard world

Chapter 83 Ordinary People
Time is precious, and the video does not leave enough time for Jinguang to be shocked. If each person is delayed for 1 minute, what is delayed is each person's class!
"The physical properties of iron...the chemical properties of iron...the nuclear reactions of iron..."

"The method of preparation of iron and the storage and transportation of iron are;..."

"The product use of iron is... iron in life..."

The video provided by Shi Hao contained a torrent of knowledge, no matter how many turbulent waves these words caused in Jin Guang's heart, it indomitably opened up territory in Jin Guang's mind.

When the video is played: "Steel is a general term for iron-carbon alloys with a carbon content between 0.02% and 2.11% by mass.

The chemical composition of steel can vary greatly, steel containing only carbon is called carbon steel or ordinary steel.

In actual production, steel often contains different alloying elements according to different uses, such as manganese, nickel, vanadium and so on.

The production of steel is a high-cost and low-efficiency work.

Today, steel is one of the most used materials in the world due to its low price and reliable performance, and it is an indispensable component in construction, manufacturing and people's daily life.

It can be said that steel is the material basis of modern society. "

Jin Guang was already trembling. He marveled at the wonder and greatness of the knowledge in the video, and he didn't know what expression or words he should use to sum up his current mood.

"This...he...damn...is it true?"

Jin Guang was dumbfounded, unable to believe what he saw in front of him. He sat in his seat blankly until the video was played, and he didn't come back to his senses for a long time.

-

The same thing happened in other classrooms of the academy.

"Director, if you have time to show me the video, you might as well go and catch some fire-attribute elves with me." Yan Fan said casually to the door.

"Let's talk after reading it." Shi Hao replied outside the door.

Yan Fan chuckled, he didn't think Shi Hao could come up with anything that would make him dumbfounded.

until the sound of the video appears.

"What is fire?"

"Easy to understand: fire is a special form of matter. Fire is a strong oxidation reaction in the process of burning objects, and the light and heat it emits is a phenomenon of energy release."

"In a broad sense: the main components of fire could be neutral gas molecules, plus a weakly ionized non-equilibrium plasma with an ionization degree much less than 0.01. Very low ionization, very low ionization, very low ionization. Or other possibilities. "

Yan Fan:? ? ?
"What is this video talking about? Fire? Is it the fire I know? Is it the fire that the elf spewed out?"

"Why can I understand every word, but I can't understand anything together?"

Yan Fan stared at the screen dumbfounded, not daring to blink, fearing that he might have missed something important, he never thought, never thought, that someone would tell him about fire?
"The basis of fire is combustion, temperature and degree of combustion."

"What is burning?"

"Combustion is the process of rapid oxidation of objects to produce light and heat. Combustion requires the coexistence of three things to occur, namely, combustibles such as fuel, combustibles such as oxygen, and the temperature to reach the heat of ignition. We call it combustion three. Elements - Fire Triangle."

"How to distinguish the temperature of the fire?"

"Even if it is the same flame, the temperature will vary due to different parts. For example, the external temperature of the burning flame of the alcohol lamp is high, while the internal temperature of the burning cigarette can be as high as 800 degrees or more."

"The flame is infrared in color at low temperatures, as the temperature rises.

火焰从红色橙色的3000度到黄色白色4000度，再到青色蓝色5000至6000度，到紫色7000以上到最后看不见的紫外线几万度。颜色在不断改变。

From the perspective of high-energy physics, flames in the infrared and colored spectral segments are all low-energy flames. As the temperature continues to rise, the colors of the flames may range from ultraviolet rays to x-rays to gamma rays. These are indescribable flames. "

"There is also the factor of the degree of combustion. It is the intensity of the oxidation reaction. The flame temperature of the alcohol lamp and the alcohol blowtorch are very different. Generally, the flame cannot fully oxidize due to insufficient contact with oxygen inside, so the temperature of the inner flame is the lowest. That's why it doesn't feel hot to put out a candle with your hands."

Hearing this, Yan Fan hugged his head tightly, with an expression of wanting to look but not daring to look.

He didn't understand, didn't understand why Shi Hao showed him this, didn't understand why Shi Hao wanted to tell him such a sacred and confidential thing.

He was trying to control himself.Fearing that I couldn't help rushing out of the classroom, I couldn't help but rushed to the field to find Yanya, and told Yanya loudly: What kind of field to plant, hurry up, come back to the village with me, I have seen the future, I have seen the truth!
At the end of the video, Shi Hao also placed a very practical easter egg.

"How to increase the flame temperature?"

"Due to the increase of flame intensity, that is, the same total heat is released in a smaller volume, and the result of the reduction of nitrogen content, the flame temperature is increased, thereby enhancing the heat transfer of the flame to the surrounding by radiation and convection. For example, when burning heavy oil , we increase the concentration of oxygen in the air from 21% to 22%, and its theoretical combustion temperature can be increased by 80°C.

Therefore, increasing the flame temperature means increasing the combustion point, increasing the energy of the flame and fully burning the substance. "

Yan Fan trembled all over, trying his best to restrain his urge to yell.

He who is usually hot-tempered, now feels like he is in an ice cellar.

Fear, trembling, excitement, madness, all kinds of emotions wrapped him up.

At this time, Shi Hao pushed the door open and entered.

"How is it? Do you still want to catch elves?" Shi Hao asked with a smile.

"Why did you tell me this? Why? Who are you? Are you a god?" Yan Fan looked at Shi Hao with incomprehensible eyes, which were full of puzzlement and doubt, as well as a piety that he couldn't even perceive .

Shi Hao walked to Yan Fan's side, and lightly patted Yan Fan's shoulder.

"I'm not a god, I'm just an ordinary people."

-

Not everyone's attitude towards Shi Hao's special study is careless and careless.

At least the wooden crown is not.

After knowing the existence of herbicides, Mu Guan's fear and precautions towards Shi Hao are always at the highest level.

After seeing the stunning academy buildings, Mu Guan's admiration for Shi Hao is also the highest.

After knowing that Shi Hao has power beyond his own cognition, Mu Guan's respect and humility towards Shi Hao are also of the highest level.

Mu Guan thought that his vigilance, fear, worship, humility and respect were already the greatest praise and respect he could give Shi Hao.

Until, the video in the wooden crown classroom lights up.

"What is a plant?"

"Plants are those eukaryotic organisms that have chlorophyll and cell walls that are capable of autotrophy.

Plants have obvious cell walls and nuclei, and have the ability to photosynthesize. With the help of light energy and chlorophyll, they use water, inorganic salts and carbon dioxide to perform photosynthesis, release oxygen, and produce glucose.

Plants metabolize through respiration, which can be divided into two types: aerobic respiration and anaerobic respiration according to whether oxygen is needed. "

Wooden Crown: Chlorophyll?cell wall?Plants breathe?Aerobic respiration?Anaerobic respiration?
"Me? Did I hear wrong?" Wooden Crown muttered to himself in shock.

(End of this chapter)