my scientific age

Chapter 50
After finishing the first book, I started to read the second math book, also produced by Princeton University.

As a world-renowned institution of higher learning, Princeton's achievement and level in the field of mathematics are far ahead of MIT, and it is not inferior to Cambridge University. most of them.

One thing to say, after Yu Hua nibbled at the mathematics books published by Princeton, he had to sigh that the books published by the top famous schools have high gold content.

"Wow wow wow."

The sound of turning the pages of the book kept on sounding, and many students frowned when they heard the sound, and saw Yu Hua kept turning the book like a madman, and they were speechless.

Damn, is this called reading?
It's clearly a joke!
Rao was Lin Wan. He had to look up when he heard the movement. He looked at Yu Hua, who was attentive but kept flipping through the book. He looked at the math problems in it, found it interesting, smiled, and went back to study.

Time passed, and at ten o'clock in the evening, Yu Hua had finished reading three mathematics books, and his mathematics level had been greatly improved.

Five books, two mathematics textbooks, and three mathematics books.

"It's time to go, we'll continue tomorrow." After consuming the third mathematics textbook, Yu Hua withdrew from his highly focused study state. He felt a faint feeling in his head. This was an overreaction with his brain. He felt drowsy and raised his watch. Check the time.

This feeling in the head means that the limit has been reached and it is impossible to continue learning.

It's pointless to force study.

Time, [-]:[-] p.m., and productive study time increased from six hours to eight hours.

Knowing what to do, Yu Hua closed the books, packed his things and got up. Seeing that Lin Wan was still studying English, he left without disturbing her.

……

in the dormitory.

The kerosene lamp burned slowly, releasing a dim light.

Holding the wire in one hand and a knife in the other, Yu Hua carefully peeled off the plastic skin to expose the copper core inside, and then wrapped the copper core around the positive pole of the small inverter.

Surrounded by roommates, Liu Tao, Zhou Yuan, Ji Han, Cheng Youping and Cao Wei were attentively staring at Yu Hua and the portable lighting power supply equipment on the desktop, not even breathing.

After three days of waiting, taking advantage of the weekend today, Ji Han finally came back with this set of lighting power accessories worth 20 yuan. After Yu Hua came back from the library, he was dragged by everyone to make lighting power supplies.

The most valuable parts of the whole set are the same, batteries and inverters, light bulbs, switches and wires are all sent.

"Give me a Phillips screwdriver." After connecting the positive pole of the inverter, Yu Hua turned around to connect the battery, peeled off the plastic skin to reveal the communication, wrapped it around the positive pole of the battery battery, and shouted.

Liu Tao, who was the closest, hurriedly handed over the Phillips screwdriver. Yu Hua took over and tightened the battery screws, finished fixing the positive pole, and dealt with the negative pole. After finishing the device, Yu Hua pulled the wire and arranged the light bulb and installed it in the middle of the bedroom.

After a tinkling tinkling, the wiring is completed and the 100W incandescent bulb is installed.

everything's ready.

Yu Hua wiped his sweat, smiled at the crowd, set aside his seat, and gestured for the light switch: "Who will turn on the light first?"

The five roommates looked at each other, put their right hands together, held the light switch together, and turned to Yu Hua.

Seeing this scene, Yu Hua smiled, stepped forward, turned on the inverter switch, adjusted to the corresponding mode, and put his hands on the back of Cao Wei's hands.

"Da!" A crisp and short switch sound came out, and in the next second, the incandescent light bulb installed at the top of the bedroom was energized and activated, emitting a bright and dazzling light, the bedroom was bright, and there was no dim scene of the kerosene lamp.

"Buzz!"

The sound of the inverter working stably can be heard.

"Haha, I'm waiting for the light!" Feeling the light from the incandescent lamp overhead, in a bright environment, Liu Tao couldn't help being surprised and shouted loudly.

Light!
The light that symbolizes hope comes from the light of an electric lamp.

The meaning of light is no trivial matter. From now on, they will be able to read and study in their dormitories, no longer have to endure dim kerosene lamps, and no longer have to suffer from the pain of myopia.

In a big way, the light of the electric lamp symbolizes civilization and progress, not backwardness and ignorance.

"I'm waiting for the light!" Zhou Yuan and the other four were extremely excited, bathed in the light, and couldn't help hugging Yu Hua tightly.

Everyone was happy like a fool, and Yu Hua was a little relieved and a little sour. The so-called portable lighting sources in front of him actually had no technological content. The difficulty of research and development was nothing more than assembling them. Culturally middle-aged people will pick it up.

But in this era, this group of portable lighting sources has been labeled as 'advanced', symbolizing civilization and technology.

Of course, to say that there is no scientific and technological content, it is not correct in the strict sense. After all, these components such as batteries and inverters are all the crystallization of knowledge and the embodiment of technology.

"Quiet, keep quiet, everyone. Have you all learned what I did just now?" Yu Hua signaled everyone to be quiet, and asked after everyone suppressed the excitement in their hearts.

Everyone looked at each other, nodded, and said in unison: "I learned it." The process of assembling the lighting source by Yu Hua was observed by everyone in the city. The whole process is very simple, just follow the cat and draw the tiger to complete.

After a round of observation, everyone has learned how to assemble this advanced portable lighting source.

Yu Hua nodded and said, "That's good, I have an idea, I don't know if I should talk about it or not."

"Why should Yu Hua be like this? We are both classmates and sleeping together. If you have an idea, just be straightforward." Liu Tao said bluntly.

The rest of the people nodded.

"I want to make a small fortune with this portable lighting source." Feeling the eyes of everyone, Yu Hua did not hide it, but directly revealed the hidden thoughts in his heart.

Make money.

Relying on this kind of simple portable lighting source that can be easily copied, making a small fortune is an idea that Yu Hua had at the beginning, but he never said it.

"I think it's something, of course it's no problem, but, Yu Hua, the cost of a set of components for a portable lighting source is 20 oceans. This is still a family relationship with Ji Han, which is difficult for ordinary people to accept. But the nobles don't like it..." Liu Tao heard Yu Hua's idea, but he didn't object, put himself in Yu Hua's shoes and thought about it, and after thinking about it, he couldn't help frowning slightly.

The price of the whole set of portable lighting sources is undoubtedly expensive. The cost alone can reach 20 oceans. This is not counting the electricity bill. The price is so expensive that ordinary people cannot afford it.

However, the wealthy and wealthy people do not look down on it. They live luxuriously, and a chandelier can be worth hundreds of oceans.

High or low.

"I don't sell ordinary people, I don't sell rich people, I only sell it to you." Yu Hua responded with a slight smile.

(End of this chapter)