Ding Dang remade an arrow crossbow in front of Zhao Xinghua, Liang Hanba and Jiaojiao.

Several people saw that after the two different metals were docked together, they slowly merged into one, and there was no gap in the joint, just like a steel pipe originally grown in the spring sheet of the car, which was more accurate than the most advanced precision welding machine before the end of the world, and there was no slightest discoloration, and it was not welded together after high-temperature melting.

Liang Hanba and Jiaojiao glanced at each other in surprise, with a look of surprise in their eyes.

Zhao Xinghua looked at the expressions of the two people around him and guessed that they must have sensed frequencies such as brain waves.

Sure enough, Jiaojiao spoke first:

"It's a strange fluctuation, I can detect it, but I can't imitate it."

Liang Hanba also said:

"The fluctuations are completely different from ours, I can feel the radiation of energy, but it is not strong, what is the reason? Can brainwaves also change metal properties? ”

"Mom, they said they could sense the source of my skills, I didn't lie to you!"

After listening to the exclamation of the two, Ding Dang excitedly shouted to his mother.

Ding Dang's mother also put down the work in her hand when she heard this, and came to a few people.

"Ding Dang told me that he originally wanted to make an iron crossbow to protect us, and after several unsuccessful experiments, he inadvertently focused his attention, and he could feel the magnetic field between the two metals, and he was able to control this magnetic field and change it, and as a result, he succeeded in connecting the metals on his hands. I still didn't believe it, I didn't think he did it through his brain. ”

Zhao Xinghua sensed from Ding Dang's mother's words that this woman had some insight into the strange things that happened in front of her, so he asked:

"Mrs. Ding, do you understand the principle of intermetallic properties?"

"My mother used to be a physics teacher, and I was instructed by my mother to master this skill."

"I only know a little bit about the physical properties, and I don't know how Ding Dang did it. I guess he did it with the same kind of mind power as in a science fiction movie. ”

The woman in her thirties changed into a clean dress, which she could see that she had treasured for a long time before she took it out to wear today, and the clothes should have been pressed in the cabinet for a long time, and the folded indentations on it were still clearly visible.

"Each metal has its own unique magnetic properties, which are generally divided into concepts such as "paramagnetic", "countermagnetic", "ferromagnetic", "antiferromagnetic", etc., iron, cobalt, and nickel are typical ferromagnetic materials that are very responsive to magnetic fields. Since the magnetism of a magnet is derived from an electric current, which is the movement of an electric charge, the magnetic field is generally generated by a change in the moving charge or electric field. The ultimate structural group of any matter is electrons, protons, and neutrons, and theoretically changing the magnetic field of a metal can change the compatibility of a metal. ”

Ding Dang's mother said that a few people were still confused when they saw it here, and found the feeling of teaching again, and continued:

"A moving charge or a changing electric field can produce a magnetic field, and when an alternating magnetic field is generated, the metal ring within the magnetic field can be changed. It's just that I don't understand how Ding Dang generates electricity or controls the magnetic field. ”

Zhao Xinghua, Liang Hanba and Jiaojiao were still confused and didn't know why.

If Zhao Jie was here at this time, he would explain the truth to the few people in front of him.

There are many charged ions (potassium, sodium, chloride, etc.) in the cells of the human body, with potassium ions inside the cell and sodium ions outside the cell. In the physiological activities of the human body, the permeability of the cell membrane changes, and potassium and sodium ions are exchanged, resulting in bioelectricity. According to Maxwell's theory of electromagnetic fields, a changing electric current is capable of producing a magnetic field, so the changing bioelectricity creates a human magnetic field.

It can also be said that the reason why the magnetic field of the human body exists is because the universe itself is a magnetic field, and the earth is a magnet. Magnetism is indispensable for people and nature to live in harmony. Pigeons can send messages because the natural magnets in their bodies can navigate like a compass; During an earthquake, the animal's keen senses can detect changes in the earth's magnetic field and react. Any living thing has a magnetic field, but the strength is different.

The principle of magnetic field generation, as Ding Dang's mother said, is that the current moves, and once the current moves, a magnetic field is generated around it. A normal person will have bioelectricity in their body, but it is all messy and cannot form an electric current. When Dante is in the body after a natural disaster, certain functions in the body are strengthened, and the trillion cells in the body, each of which undergoes an electrical and magnetic conversion within or between them, can mobilize the cells in the body to participate in this exchange, and can produce something similar to a strengthened magnetic field. Just like some qigong masters can hold a light bulb in their hands to generate electricity, they have mastered this law of operation.

Although Ding Dang did not systematically practice this skill, the frequency of the human magnetic field generated by the strengthened body was close to that of the metal, which gave him the ability to control metal.

Zhao Xinghua didn't continue to dwell on the principle, took out his battle knife, handed it to Ding Dang and asked:

"Try to communicate with it."

"Ahh What a sinister atmosphere! ”

After Ding Dang took the sword, he shouted fiercely.

Zhao Xinghua and the others all showed expressions of disbelief.

"Hahaha, just kidding!"

"This metal is very inert, and I can't change it."

Ding Dang first made a prank joke like an ordinary child of his age, and then expressed some regret to Zhao Xinghua and others.

"But I can make ordinary iron harder."

Ding Dang saw that Jiaojiao's expression showed a look of contempt, and immediately added.

Zhao Xinghua remembered that the arrow shot by the boy in front of him at the D-type zombie at night seemed to have the light of Youlan, so he took a polished iron bar and handed it to Ding Dang.

Ding Dang didn't see any preparations, so he directly inserted it into the steel pipe of the railway, pulled the wire rope, pulled the thick spring steel sheet to the maximum angle, and raised the iron crossbow to shoot an arrow at the wall again.

"Huh!"

This time, a few people saw a blue light as fast as thunder and lightning flashed in front of their eyes and disappeared, Jiaojiao ran to the position of the wooden board to check, but did not find the crossbow arrows shot, after pushing open the template, they found that there were many holes in the wall, thinking that these were left after the crossbow arrows with the ability to shoot through the wall.

"No wonder."

Zhao Xinghua understood now, it turned out that this boy's hand was strong and could pull such a thick spring steel sheet, but now it seems that he manipulated the metal, and the spring steel obeyed his will in front of him.

However, this terrifying crossbow bolt shooting effect is no less than those sniper rifles, but the distance is not so far, but this is a semi-long-range weapon that is close to silence, and this Ding Dang will definitely be the top powerhouse in the last days if he grows up a little.

Zhao Xinghua's prediction is not wrong, once the solar storm stops affecting the earth, these brainwave abilities will change by leaps and bounds, and now the various free electrons in the earth's atmosphere seriously affect and restrict the exertion of their abilities.