Question Time

The biggest doubt in Li Mo's mind now is the "small star" flying at high speed 7.5 light-years away. If it is just a small high-speed star, that's fine. But if it is an aircraft or the like, then the problem will be bigger.

However, this kind of question obviously does not comply with the general provisions of the Universal Civilization Law, and there is no way to ask the big-brained Pajero directly.

Li Mo thought for a long time and finally asked: "Can I start asking questions now?"

Gray fog billowed on the high platform, and the voice of the big-headed Pajero came.

"Please ask questions!"

"Does such a small star exist in the universe?" Li Mo asked tentatively.

The big-brained Pajero didn't say anything to stop him.

He was overjoyed and continued: "Its trajectory is a straight line, and its speed reaches 1/2 the speed of light."

"What would it be if it weren't a small star?"

These are actually two questions, and Li Mo nervously waited for the answer.

Gray fog billowed on the high platform, and the big-headed Pajero seemed to be thinking.

a moment later

"Such a small star does not exist. This is unscientific!" The big-brained Pajero man gave a clear answer. "Small stars are the most common celestial bodies in the universe. Their mass and volume are much smaller than planets. The reason for their formation is

The part of the mass that escapes in a collision between two massive stars or a supernova explosion."

"A small star is also a star. It has its own orbit and will be affected by the gravity of the large star. Therefore, it is impossible for a small star running in a straight line at half the speed of light to appear."

"If it's not a small star, what is it?" Li Mo asked eagerly.

"These are actually two questions." The big-brained Pajero saw through his "conspiracy", "But this kind of question is too simple, so I will help you answer it by the way."

I didn't expect this alien to be quite humane from Earth, Li Mo thought to himself.

"It runs in a straight line and the speed is half the speed of light. These two conditions determine that it can only be an interstellar spacecraft of a certain civilization." The big-brained Pajero gave the final answer.

"Starship?"

"What is it flying towards the earth for?" Li Mo was shocked.

The high platform was filled with gray fog, and there was no answer.

Li Mo knew that Big Brain wouldn't be able to answer this question for him.

New task released

Mission: Apply what you learn

Mission Statement: Scientists are not nerds, they are the creators of the future

Mission requirement: Invent a technological product that can change the world

Mission time limit: 365 days

Accept: Yes

An invention that changes the world? This request is too outrageous. What invention can change the world? To put it more broadly, the four great inventions of ancient China changed the world.

The invention of the compass allowed humans for the first time to identify directions without relying on the surrounding scenery, and also made long-distance navigation possible.

The emergence of papermaking has greatly reduced the cost of knowledge exchange and allowed mankind to enter a civilized society faster.

The invention of gunpowder marked the greatly enhanced human ability to transform nature, and was also of great significance to the advancement of military weapons.

The invention of printing is conducive to saving manpower, material resources, and financial resources used for printing; it is convenient for arrangement and modification; it greatly improves printing efficiency; it is conducive to the unification of versions; it is conducive to the dissemination and retention of culture, and it is conducive to the promotion of knowledge and technology.

For modern times

On the one hand, the steam engine internal combustion engine solved the engine problem of transportation, caused revolutionary changes in the field of transportation, further enhanced people's production capacity, made transportation more convenient and faster, changed people's lifestyles, expanded the scope of people's activities, and strengthened

communication between people.

When computers appeared, humans began to truly have a tool that could simulate human thinking. In the following years, countless scientists worked hard towards this goal.

These inventions have changed human life and production methods, and they are also the crystallization of the wisdom of countless people.

The history of computer development shows how difficult all of this is.

As early as 1642, Pascal invented the first mechanical computer in human history - Pascal's adding machine. Of course, it was just a device composed of a series of gears and could only do addition and subtraction.

Leibniz then invented a new type of computer, which was about 1 meter long and had a series of gear mechanisms installed inside. In addition to being larger in size, the basic principle was inherited from Pascal, and it could continuously and repeatedly perform additions.

The computers shown above can only be regarded as physical computers, and they perform calculations through gears.

The real electronic computer was only successfully developed in 1942. It was the Elixir, which could perform 5,000 addition operations per second and 400 multiplication operations per second. It was 1,000 times faster than an electromechanical computer that used relays and was calculated by hand.

200,000 times.

Although its performance is very powerful, it consumes a lot of power and is expensive. It consumes more than 174 kilowatts of electricity. It is said that in those years, as long as the Eliac was started, all the lights in the entire city of Philadelphia were suddenly dimmed. The cost of maintaining it

Later, it exceeded 2 million! The most fatal flaw of Eliac is the separation of program and calculation. The program instructions that command the operation of Eliac's 20,000 electron tubes are stored in the external circuit of the machine. It needs to calculate a certain

In front of the problem, Eckert had to assign dozens of elite soldiers to connect hundreds of lines by hand, working like a group of telephone operators for several days before he could perform a few minutes of calculations.

At this time, a mathematician stood up. He was von Neumann, who was later known as the father of modern computers. He used superb theoretical and technical methods to transform Eliac, and even proposed the famous

"101 Page Report". This report laid a solid foundation for modern computer architecture. To this day, it is still considered a landmark document in the development of modern computer science.

Later, large-scale ultra-large-scale integrated circuits replaced high-energy-consuming electron tubes. The cost was greatly reduced, and computers were able to enter thousands of households and become the driving force of social development.

Only then did the development of computers truly enter the electronic age and become an invention that changed the world.

That's outrageous! Li Mo felt that the tasks given by the system were getting more and more difficult. Is the world so easy to change? Countless young people full of heroic ambitions turned into nothing more than a handful of loess.

"Maybe the system is anxious?" He felt that the tasks given by the system this time were not in line with its usual "smooth" style and seemed a bit anxious.

Fortunately, this time the system is very willful and gives a super long time of 365 days. Of course, this super long time is compared to the previous 30 days of each mission time limit.

finally

He clicked accept anyway.
Chapter completed!