Tianfang, who stayed in the fairy palace for more than eight months, finally returned to the school, and the fat man and Yang Xiao held a grand welcome ceremony for Tianfang, that is, eating and drinking, after all, in terms of time, Tianfang has been away for almost four years. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

In the past four years, Tianfang found that the fat man and Yang Xiao had a different temperament from the original, that is, the scholarly anger, or the temperament of the researcher, and the chat between the three of them has also changed from the original various non-nutritious ridicule to each other.

"Third child, why do you say that there will be this kind of escaping energy in the metal after the hundred and fifty?" The fat man said: "I don't understand the half-life and radioactivity you said last time, you have to explain it to me!"

"In the past four years of research, you should now have a deeper understanding of the elements, the basic atoms of an element are composed of protons, neutrons and electrons, and the larger the number of protons and neutrons, the more unstable their properties are. Radioactivity refers to the spontaneous emission of rays from these unstable atomic nuclei, which is divided into several types, the most important being α rays, β rays, γ rays, etc., and the decay stops emitting after forming stable elements, this phenomenon is called radioactivity. The energy emitted during decay is called decay energy. In the world of my dreams, there are only about 100 kinds of elements, and after element 83, there is such radioactivity, but maybe due to the problem of spatial stability, we will not appear such a radioactive substance until element 151 starts, but I think the principle should be the same!"

"So, what are α rays, β rays, γ rays?"

"α rays, also known as α particle beams, high-speed moving helium nuclei, β rays are β particles, refers to the β decay of radioactive substances, the release of high-energy electrons, he is also divided into positive and negative! γ rays, also known as γ particle flow, are the rays released when the energy level of the atomic nucleus transitions and transforms, and it is an electromagnetic wave with a wavelength shorter than 0.01 angstroms! These can be detected by scientific means, next time we will design and assemble several testing instruments together, with the help of this instrument, you can better understand these things!"

"Stop first, I said that I will get the instrument next time, I still have a few questions here, I have calculated a lot of things according to the knowledge of fluid mechanics you gave, and the aircraft you said, it has indeed become a reality after the wind experiment designed by me, so the fluid mechanics you gave, is the water flow also applicable to this mechanical model?"

"By the way, you can draw inferences, as long as it is a flowing thing, air, water flow, and even our spiritual fluid, it should all conform to this model of fluid mechanics!"

"Hey, wait, I haven't finished asking yet, so what's the use of these α rays, β rays, and γ rays that escape?"

"In the world of my dreams, these rays have their own uses, but here, I haven't experimented yet, so I can't make a conclusion, so let's wait for the next time our machine comes out and study it together!"

"It's my turn, what are the questions you asked, it's going to take a long time, I'm here that the situation of your plane is verified and feasible, but what is the situation of the city in the sky, he doesn't apply fluid mechanics! And the gravitational force and centrifugal force you said, especially what you said, how is the gravitation constant calculated?"

"The constant of gravitation is a very complex algorithm, which has to go through a lot of verification, and when the time comes, we will study it together, and the constant of the dream world may not necessarily correspond to the reality here, so we have to verify it carefully!"

"About Sky City, next time you build a spirit ship, we should do a simple experiment, but before that, we can calculate the gravity of our planet!

"There is a very simple verification method for centrifugal force," Tianfang took out a piece of silk, hung a small object, and began to throw it up: "See, this thing is spinning now, why can he keep this rope straight? There is a role in centrifugal force!"

"Centrifugal force is actually a kind of inertia, and these can be calculated through various calculations! These things involve a lot of knowledge," Tianfang suddenly sat up: "Come on, come on, take out your mobile phones, I have found you a private teacher, and his knowledge is even better than mine!"

"Didn't you say that you learned all this knowledge in your dreams?

"No, it's one of the most awesome things in the scientific world that I inadvertently came up with by chance, artificial intelligence, I taught her all the knowledge in my dreams, she can not only explain, but also show you through images, which is much better than my side!

"Good daughter, come on, come on, introduce you to two studious uncles," Tianfang turned on the phone screen, Nuwa's smiling face is now the background screen of the phone, of course, his function is not just the background screen.

"Dad, what's the matter, I've been learning about the history of this place lately, it's so interesting, I'll tell you!" said Nuwa's clone with a look of surprise.

"Nuwa, you also get a clone on your two mobile phones here, you can give them certification, they are Dad's good brothers, and they are also your uncles and uncles, they have a lot of knowledge to learn, you can guide them more when you have time!"

"Okay," As soon as the words fell, the mobile phone screens of Yang Xiao and the fat man lit up, and a Nuwa's background appeared on the screen.

"Which one is the uncle, which one is the uncle!" Nuwa's sweet voice rang on both mobile phones at the same time.

"I'm an uncle (uncle)," Yang Xiao and the fat man were surprised: "Do you really have your own thoughts?"

"Except for the fact that she doesn't have the same body as us for the time being, everything else is the same as us, of course, there is a little difference, that is, her way of thinking is different from ours, although she shows the innocent and romantic side of a little girl, but her way of doing things is absolutely rational!" Tianfang said.

"Absolute rationality, so powerful?" The two also knew this state of absolute rationality, which was the best state when dealing with things, and in this state, many crises could be safely passed.