Juan followed Lolita to her lab, a very large empty room.

There are a lot of copper coils, cables and disassembled machinery inside.

In front of these items, there was a huge shelf with two metal tracks placed parallel, one end connected to a cable and the other end was open, looking like a huge tuning fork, pointing to the wall in the distance of the empty room.

Lolita put five fully charged "blue crystals" in the energy box connected to the "tuning fork" through an enameled copper coil.

What a thing? It actually costs five blue crystals, which consumes a bit too much power. No wonder Yaling "saves electricity" and thought of breaking the power from the laboratory.

Juan thought about this and saw Lolita taking an aluminum alloy rectangle as big as a fist, stuck at the end of the cable connecting the parallel track.

"Look at it!" Lolita said, closing the switch, and then used an insulating rod to push the aluminum alloy rectangle in the parallel track.

Juan saw that the aluminum alloy rectangle stuck between the two tracks quickly slid forward.

Its speed was so fast that it couldn't be seen clearly in the blink of an eye.

"Dong"

The wall opposite the parallel track made a huge sound, as if it was hit by a shell in the front.

Fortunately, the building is strong enough that this level of damage will not cause cracks to the wall.

Juan rubbed his ears in pain and shouted, "Lolita, you should remind me to wear earplugs!"

"What, earplugs?" Lolita took out the earplugs from her ear. "Sorry, I'm just a pair here."

Before Juan could complain, Lolita had already run to the wall in the distance to check.

Juan followed.

He saw that the aluminum alloy rectangle had completely disappeared, sticking to the wall like mud, and there were splashing fragments around it.

"This is so powerful, it's just the effect of RPG hitting it."

"Awesome, my new work - electromagnetic cannon."

"It turned out to be an electromagnetic gun. I understand. When the two tracks are turned on, an electromagnetic field is formed, and then the electromagnetic field is attracted to it, repels the metal block, and sends it out at a faster speed.

"Hey, no, this is an aluminum alloy, can aluminum alloy be magnetized?

"I remember, it seems that only metals such as iron, cobalt, and nickel can be magnetized."

"Aluminum alloys cannot be magnetized of course."

Juan was confused: "Then why did this thing be shot out by electromagnetic tracks? Shouldn't it?

"How can an aluminum alloy without magnetic properties be affected by a magnetic field? It should stay in the track and remain motionless?"

"Did your physics teach you by a physical education teacher?"

"No, I graduated from a regular school."

"Then how did you pass the physics exam?"

"This is just a little trick."

"Cheating is cheating, what's there to hide?"

"Don't tell me it out, I'm also shameful."

"Okay, then I'll explain it to you."

Back to the side of the transmitter, Lolita pointed to the track that emitted high temperature and heat due to violent friction and said:

"When two rails are connected to the power supply, a large current flows in from one rail, flows back from the other rail through the metal slider.

"At this time, a strong magnetic field will be generated between the two guide rail planes.

"The slider with current is emitted at a very high speed under the action of ampere force, and in theory it can even reach the sub-light speed. This is the launch principle of the railgun."

Lolita picked up another aluminum alloy rectangle and said:

"Around any metal, as long as the magnetic flux through it changes, a closed eddy current will be generated inside the metal.

"Once this eddy current inside the metal is generated, it will form a magnetic field around it."

"I understand, so it is not that the aluminum alloy itself is magnetized by the orbital magnetic field, but that the magnetic field formed by its internal current is driven by the external magnetic field.

"But why use aluminum alloy? Isn't it better to use iron?"

"Because aluminum has a small resistivity, when the frequency of change of magnetic field around it is relatively large, the eddy current intensity in aluminum will also increase accordingly."

"Then why don't you use copper? The resistivity of copper is smaller than that of aluminum."

"Why don't you talk about silver?"

"Silver is too expensive, it's too expensive, it will hurt if you ejaculate." Juan looked in pain while holding his heart.

"Haha," Lolita was amused by Juan, and she said, "I use aluminum not to save money, it's because aluminum is lighter than copper.

"The instantaneous impact force calculation formula: ft=mv, do you know?"

"I know that f is the average force, t is the time, m is the mass of the object, and v is the speed."

"It seems that you know nothing about physics, either."

"I said that I used a little trick during the exam, and most of it was done by myself."

"Haha, then I won't say much. You should understand that when the average force and time remain unchanged, the smaller the mass of the object, the greater the speed."

"Oh~, so use lighter aluminum, but if the shells are light, will the strike force become smaller?"

"It seems that this is the part of your cheating in the exam."

"Can you not mention this?"

"Haha, since you know the conservation of momentum, you should also know that the conservation of kinetic energy ek=(1/2)mv2."

Juan slapped his head: "I remembered that I didn't cheat on this part, but I just forgot about it after a long time.

"So the kinetic energy of an object is related to speed and mass. The greater the speed of an object, the greater the kinetic energy, the greater the mass, the greater the kinetic energy.

"I just said that the shells are light and the strike force will become smaller. This is the principle, right?"

"Please, the speed is square!

"When ft=mv, reduce the mass by half and you can double the speed.

"When ek=(1/2)mv2, multiply the mass of this 1/2 by 22's velocity squared, which is 4 times, you can get 2 times the kinetic energy.

“My transmitter is affected by the manufacturing process and energy supply, and the ampere force provided cannot be increased any more.

"In this case, reducing the quality of the slider is the most effective way to improve attack power."

"Pai Papa Papa Papa", Juan applauded and exclaimed: "After all, it's a scientist, amazing!"

"Come on, do me a favor, let's try the extreme power of this electromagnetic gun."

Lolita unceremoniously pulled the boys and sent Juan to do things.

Juan rolled up her sleeves and started working with Lolita with enthusiasm.

This time, Lolita took out a stack of aluminum alloy rectangular sliders.

After starting the electromagnetic gun, the sliders fired out one by one, and the frequency was as fast as an impact drill to hit a wall.

"Dongdongdongdongdongdong..."

The deafening sound echoed in the room.

Although Juan blocked his ears with a strip of cloth, he was still shocked.

The wall opposite was covered with deformed aluminum alloy lumps.

However, there was still no crack in the wall.

"boom"

The track that turned red due to repeated high-speed friction finally couldn't hold on and was "exploded".

Juan subconsciously rushed over and protected Lolita under him.

"Ah~!"

The severe pain from his back made Juan know that he was injured and not light.

Chapter completed!