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Volume 1 Chapter 303 Powell

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    Chapter 303 Powell

    Along the way, Liu Fei chatted with this sloppy middle-aged man. In fact, most of them were middle-aged people talking. Liu Fei was listening, and Liu Fei focused more on passing by the roadside.  On top of the suspended troop transport armored vehicle, he found that the atmosphere of war became thicker as he went inside. Moreover, after entering the corridor, there were no police officers anymore. They were all soldiers wearing military uniforms and holding weapons.

    From the chat, Liu Fei got a general understanding of this middle-aged man.

    The sloppy middle-aged man is a scientist, mainly engaged in physics research, and his best is mechanics. Of course, judging from some of the complex professional vocabulary he mentioned, his knowledge is quite complex. For this kind of person, Liu Fei has never  There is no lack of respect. In addition to nodding, he will occasionally answer a few questions.

    "Oh, I forgot to introduce myself. Everyone calls me Powell. What about you?"

    "Liu Fei."

    "Hmm, I've also done some research on armor structures and materials. If you have any questions, you can ask me. Maybe I can answer some questions for you." There were nearly a hundred people on the hoverboard, and the middle-aged man was only enthusiastic about Liu Fei.  add.

    "Liu Fei, he must have something to ask of you!" Xiao Qiangguang said with a wicked smile.

    "Why?"

    "Think about it, there are so many people here. He won't strike up a conversation, but he will get close to you. He will be courteous for nothing, and he will commit adultery or steal. Hehe! I guess this guy wants you to help him pay back the moneyLiu Fei, this guy's tone is quite  It's quite big. Just ask a few questions, make things difficult for him, and kill his prestige"

    "How long is the life span of a proton? How to understand it?"

    "ah¡­¡­"

    Powell was stunned and looked at Liu Fei speechless. The question Liu Fei raised was a physical problem that has not yet been solved. In the past, people thought that protons were different from neutrons and would never split into smaller particles.  .  This was once accepted as truth.  In the 1970s, however, theoretical physicists realized that what they were proposing as a "grand unified theory"¡ªa theory that brought together all the forces except gravity¡ªimplicitly suggested that the proton must be  stable.  Given enough time, and very occasionally, protons will split apart by capturing the dying protons.  For many years, experimenters have been keeping a close eye on large water tanks in underground experiments, waiting for the death of protons inside atoms.  But in the hundreds of years of monitoring so far, the death rate of protons is zero, which means that either protons are very stable, or their lifespan is very long-estimated at more than 1 billion billion billion billion years.

    Simply put, there is no conclusive evidence of how long a proton lives.

    "Um, please change it. I'm just an ordinary physicist." After Powell stayed for a few seconds, he said with a sad face.

    "Why does the cosmological constant have its own value? Is it zero and is it truly constant?" Liu Fei once again asked his question. This question was something he had always wanted to know, because, according to the knowledge he had,  The expansion of the universe is accelerating, and this expansion is related to the warp engine. Theoretically, the speed of the warp engine has exceeded the expansion speed of the universe. Liu Fei imagined more than once, if he could catch up with a warp engine spacecraft,  The end of the expansion of the universe?

    "Ahem The universe should be expanding at a jumping speed. But this is not actually the case. There must be some mechanism suppressing this effect. If the universe is truly supersymmetric, then the cosmological constant should be completely canceled out. But  This symmetry - if it does exist - seems to have been broken. If this constant changes with time, the situation is more complicated This problem is too complicated and cannot be explained for a while  That, that can you ask a more practical question?" Powell's old face turned red, while the little bright brain in the dark screamed with excitement.

    "The third of Newton's three laws says that action is always equal to the reaction in the opposite direction. This means that if a cart is pulled by a horse, the cart will also use the same force to pull the horse. At this time, the cart should stop at the original place.  It's not moving, so why does it move forward? The forces are equal, why don't they cancel each other out?" Liu Fei has always been a little confused about action force and reaction force. According to the third explanation of the three laws of mechanics, in  When attacking the enemy, according to the third law, he also suffers an equal reaction. However, the fact is that the enemy is injured but he is fine, which obviously does not comply with the third law.

    "Haha This is a good question. Everyone knows this law, and many people can apply it correctly, but few people can fully understand its meaning. Even I took four years to truly understand it.  Understand it. At first, I also doubted the reliability of this law. In fact, it is right, but we did not understand it correctly The two forces do notThey cancel each other out because they are loaded on different objects: one force on the horse and one on the car.  There is nothing wrong with two forces being the same, but does it mean that the same force will always have the same effect?  Can it be said that the same force can make any object get the same speed?  Could it be said that the effect of force on an object has nothing to do with the object itself and the size of the object's resistance"

    "If you think of this, then you can understand why the horse can still pull the car away even though the car is pulling the horse backwards with the same amount of force. The force acting on the car and the force acting on the horse each  They are equal for an instant; however, the cart has wheels and can move freely, but the horse is firmly stationed on the ground, so the cart has to follow the horse. Think about it, if the cart has no power over the horse  If there is a reaction force, then you don¡¯t need a horse. You can pull the cart away with a very small amount of force. But in fact, to overcome the reaction force of the cart, you still have to use a horse"

    ¡°Actually, it is easier for ordinary people to understand Newton¡¯s third law, ¡®Action equals reaction¡¯, to ¡®Action equals reaction¡¯.¡±

    "Understand, it's just like cutting muscle with a blade. No matter how sharp the blade is, it still requires considerable force to pierce the skin and muscles, just like the reaction force of a horse-drawn cart."

    Liu Fei nodded in agreement. Today, he finally figured out the problem that had been confusing him, and he felt bright and cheerful.

    Powell never dreamed that Liu Fei¡¯s request for advice on the third law was to achieve the highest level of the art of killing, because whether it is mecha combat or using Yuehua to fight, its essence is inseparable from action force and reaction force

    To put it simply, Casso¡¯s so-called art of killing is to bring action and reaction to the highest level.

    "Hey, here we are, we may get along for a while. If you have any questions, just ask." Powell was enthusiastic.

    "Um."

    At this time, the hover car has arrived at a huge cabin. Above the cabin is a huge metal dome. The metal wall under the dome is a dense metal passage. Rail cars are constantly shuttling in the passage. Some equipment and  The armor was loaded into rail cars and hover cars through some bulky cargo mechas. The entire cabin was in full swing. It is conceivable that the densely packed passages on the metal wall must extend in all directions like a spider web, and may reach any place in the space city

    "Lao Wu, a new person has arrived. Be gentle, there are contract workers!" After Liu Fei got out of the car, a policeman shouted into the busy crowd.

    "You gentle ass, Space City is about to be destroyed, none of us can survivecontract workers, contract workersdamn contractors, can't you find some experienced people?!" A man wearing a safety helmet and shirtless,  The short, fat man covered in oil came over cursing and spat at Liu Fei and the others with a look of disdain on his face.

    "One hundred and three people, please sign." The policeman impatiently handed a paper document and a pen to the short fat man.
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