The feeling of depression in his heart became stronger and stronger. Thomson didn't even have time to respond to Thomas, so he calculated on the computer. This was the keen intuition of a top scientist. He had a premonition that a crisis was brewing, a crisis that no one had expected.
Disaster is happening quietly...
He tapped the keyboard with his fingers quickly, listing various equations: kinetic energy formula, friction formula, aerodynamics, fluid mechanics, and gravity...
Soon, these formulas were sorted out on the screen. After hitting Enter, the computer began to calculate, and Thomson's breathing began to become heavy. He felt that his eyes were going dark, and there were faint signs of fainting.
The supercomputer runs very fast, and the results came out in less than a second. In an instant, he felt that his heart was being plucked severely by a big hand, and his face turned horribly pale. He really hoped
I made a miscalculation...
"Tutor, look at the ice I collected!" His student Thomas ran into the laboratory excitedly holding a piece of plastic film. When he saw Thomson working, he immediately stopped talking.
Instructor Thomson is a very strict person. If you interrupt his work, you will be criticized. No one likes to be interrupted while working.
Since the explosion of the earth, both of them have lost their relatives. The normal teacher-student relationship has become much closer, and Teacher Thomson's requirements for him have become more and more strict.
However, no matter what, Thomas can always feel a trace of care among these strict requirements. Perhaps, they are already the most familiar people with each other.
"Thomas, come and see if my calculation is correct." Thomson said in a tired tone, fearing that he had made a mistake.
This time, he deduced it again on the computer. Each formula was written step by step, which took a long time. In fact, according to his usual level, these simple derivation would not have taken so long at all. It seems that these few lines of formulas
It took him a lifetime of effort.
"This is……"
Thomas didn't notice that something was wrong with Thomson's expression. He looked at it curiously for a while, and his genius brain quickly reacted, "Oh... uh... I understand, you are calculating the speed of a ball moving at high speed.
How far can it fly in the air? Well... there should be no problem with the calculation process. Ah, this is..."
Seeing those familiar parameters, Thomas suddenly thought of a possibility. His eyes widened and his whole body trembled. He rubbed his eyes, looked again, and found that he had not read it wrong. The panic in his heart could hardly be expressed in words.
To describe it, he sat down on the ground and met Thomson's gaze.
“Has God abandoned us?!”
…
Yu Yifeng got the news the next moment. At first, his blood surged, his head became dizzy, and he felt like the sky was falling. What kind of situation was this? One wave after another, and human beings could not even eat food.
The crisis hasn't been resolved yet, and something like this happened again...
"Can't fall...can't fall..." This overwhelming despair only lasted for a while. Yu Yifeng bit his lip fiercely. The violent bite instantly made his mouth turn red. With this feeling
Painful, he became slightly calmer. As the general manager of the lunar base, he must not fall into despair like ordinary people.
Nine times out of ten, this is true. Although I am not a scientist by birth, I can still understand the basic physical formulas because it is not profound, that is, it is at the level of college physics.
These formulas start from the perspective of energy. Due to the action of friction, mechanical energy is converted into internal energy. There seems to be nothing wrong with it.
But just because of this, the troubles faced by mankind are getting bigger! A drop of cold sweat dripped from Yu Yifeng's forehead.
"Miss Yuriko, I am going to hold an emergency meeting now and require the leaders of each production group and all important scientists to participate! The matter is very urgent, immediately, immediately!" Yu Yifeng said eagerly.
"What? Is there something important? I must remind you that transferring so many important people will have a huge impact on base production!"
"No, I have something important to say! This is an order!"
…
When the meeting was held, there were even some riots. A small number of people were dissatisfied with Yifeng's behavior. They felt that an outsider had suddenly taken control of the entire base, and they were still dissatisfied deep down.
But by this time, Yu Yifeng was no longer too lazy to argue with them. He cleared his throat and said directly, "Everyone, I have something urgent to say. It may not be very seconds. Please be mentally prepared."
With a hint of suspicion, everyone sat down.
He turned on the computer screen, drew a ball, drew a layer of atmosphere on the outside, and started to demonstrate.
"Look, this is our planet - the moon."
"Here is the almost destroyed Earth. Our moon is revolving around the Earth due to the gravitational influence of the Earth."
"The moment the Earth was destroyed, due to the mass distribution, the gravity changed, so the orbit of our moon also changed... The eccentricity of the elliptical orbit is about 0.21."
"As the orbit changes, although distant places are further away from the earth, nearby places are also closer to the earth."
"We know that the earth is covered with a large amount of gas and dust. In the place where Australia used to be in the southern hemisphere, there was a super large air mass diffused by a giant mushroom cloud. As it orbits the earth, our moon will soon pass through that area.
It’s a ball of air.”
"Everyone also knows that the density of this air mass is very low, less than one hundred thousandth of the earth's atmosphere. It is a mixture of water, sand, gravel and air, and it is not harmful to us humans."
"No one takes it seriously, but because of this, we all ignore this issue!"
After hearing this, the people below started whispering, not knowing what Yu Yifeng was going to say.
"Listen to me, even such a thin atmosphere will bring a certain amount of air resistance. When the moon moves, it will generate a lot of friction with the atmosphere, converting part of the kinetic energy into internal energy."
"Think about it, everyone, the moon is so huge, the air resistance is also very huge. Therefore, our moon has been slowing down these days..."
Before the words were finished, some quick-thinking people had already realized something and were getting restless. The remaining people also began to realize that something was really wrong. The slowing down of the moon was definitely not a good thing.
The entire venue became silent, and everyone began to listen to Yu Yifeng's speech attentively. Some people's thoughts could only be temporarily hidden in their hearts.
Yu Yifeng paused for a moment, and after everyone had finished digesting, he continued: "When the moon's speed decreases, the centripetal force required for circular motion will be less than the earth's gravitational pull on the moon, so the moon will be sucked in by the earth.
Then, the entire system will maintain a new equilibrium."
"This balance is very complex. With the loss of kinetic energy, the eccentricity of the moon's orbit will increase, and the lowest point of the orbit will gradually move closer to the earth, which is very dangerous."
"Because the closer it is to the earth, the more meteorites there are, and the higher the probability of being attacked. Moreover, as the density of the atmosphere increases, the kinetic energy of the moon will be lost faster..."
"We speculate that there are three final results. The first one is that the moon is hit by a giant meteorite. The probability of this happening is extremely high. A meteorite with a diameter of ten kilometers will trigger a magnitude 13 earthquake and destroy our entire base.
"
"Second, suppose we are not hit by a meteorite. However, the moon is too close to the earth, and it is likely to be torn apart due to the pull of tidal gravity..."
"If we are lucky enough and do not receive an asteroid impact, and the moon is not pulled apart by gravity...then, after the kinetic energy is reduced to a certain level, there will also be a risk of the moon and the earth colliding."
"This process will not be short, but it will not be long either..." Yu Yifeng paused and listed a dense list of formulas given by Professor Thomson on the screen.
"According to conservative calculations, six months is the safest time!"
"In six months, we will be directly threatened by meteorites from the outside! An asteroid with a diameter of ten kilometers can completely wipe out mankind."
"It is also possible that the moon fell apart due to gravity, and then there is no need to say much about the fate of us humans."
"The best luck is twelve months. After twelve months, there is a risk of the moon and the earth colliding!"