"There is actually an easier way."
As these words came out, a serious-looking, neatly dressed young man walked out from behind.
"Wang Yu?" Wang Bo recognized the person immediately.
"Isn't your class down there? How did you get up here?"
"Our class is setting up camp. I've already finished setting up my tent. I was bored so I came to see you, Class 9."
Wang Yu answered very formally, then smiled:
"Sure enough, your class nine is as interesting as I thought."
"It is very much Mr. Ren's style to create difficulties for himself through field trips and then solve them by applying his own knowledge."
"No matter how stylish you are, you are still the head teacher of Class 9. Don't make any plans."
Hearing Wang Yu's words, Wang Bo's heart tightened for no reason, and he looked at the other party vigilantly.
This grandson still refuses to give up on his own head teacher~
You must be careful!
"You don't have to be on guard against me like you would a thief. I just want to experience the joy of learning with you." Wang Yu shook his head helplessly and spread his hands to indicate that he was innocent.
Wang Bo and others looked at each other and relaxed a little.
After the last "cooperation", Wang Bo and others also knew Wang Yu's style, and generally speaking, he would keep his word.
But even so, they only allow the other party to play occasionally.
But if the other party really intends to transfer Ren Yan to Class 1, they still have to resist firmly for a while.
"What's the easier method you just mentioned?"
After the atmosphere eased a little, Wang Bo asked his doubts.
"Battery." Wang Yu answered naturally.
Then he walked over to the pile of junk belonging to Class 9, picked up a scattered battery, and pointed to the pocket containing the junk and asked, "Can I take a piece of wire from it?"
Wang Bo nodded, but then he felt something was wrong: "How did you know we still have wire?"
"You guys have almost surrounded yourselves with wire, who can't see it?" Wang Yu smiled noncommittally and lowered his head to look for the wire.
This made Wang Bo, who was standing by, feel a little embarrassed.
Damn, I was so careless that I forgot I asked my classmates to build a fence!
Not long after, Wang Yu took out a small piece of wire from the sundries and looked at Wang Bo and others.
Then, under the gaze of Wang Bo and others, he took out some toilet paper from his pocket and wrapped the middle part of the wire.
The other two ends are directly pressed on the positive and negative poles of the battery.
Three seconds later.
The toilet paper in the middle of the wire immediately caught fire.
Looking at the flames that almost ignited instantly in front of them, Wang Bo and others blinked their eyes, confused for a moment.
What the hell is the principle behind this?!
Is it so easy to light a fire with bare hands these days?
What's the use of a lighter?
Seeing the obviously silly looks on Wang Bo and the others' faces, Wang Yu extinguished the flames and began to explain with a smile:
"The principle is actually very simple. It mainly uses electric current."
"After the electric current passes through the conductor, it will leave a certain amount of energy. This energy will always appear in the form of heat on metal materials such as iron wire."
"At this time, find some materials with a lower ignition point, and they will be easily ignited."
"I think this is probably why Mr. Ren didn't bring a lighter directly, but brought a bunch of batteries instead."
"After all, this is just some very basic physics."
Wang Yu’s explanation was very simple and Wang Bo and others understood it very well.
But then they got a little confused.
Why the hell is it physics again?!
As the saying goes, if you master math, physics and chemistry, you will not be afraid to travel around the world.
Before, they thought it was nonsense. How could mathematics, physics and chemistry be more effective than money?
But now it seems that this sentence might be a truth!
But then they turned their eyes to Wang Shanhai.
The meaning of that look was also very clear.
Look at them!
Both use physics, but others make lighting a fire realistic and easy, it just requires bending over!
As for you, you have to make a disc, pull the rope, and most importantly, make a wooden board with a fire groove carved on it. It is so cumbersome!
As an adult, I am not even as good as a student.
Little brother, can you do it? !
At this time, Wang Shanhai, who was standing aside, was also feeling a little crazy.
Looking at Wang Yu's harmless smile, he felt a little stomachache.
At this moment, he really wanted to say something kindly to Wang Yu.
Kids, do you know that it is very easy to get beaten if you pretend to be someone else's boss in society?
He had originally intended to use this battery ignition method as a trump card, and told Wang Bo and others step by step.
Let them admire his "erudition" and thus show his presence, laying the groundwork for the subsequent scene of father and son recognizing each other.
Although all this was told to me by Ren Yan.
But this doesn't stop me from using it to show off!
Now, before B could finish installing, a little kid took over and installed it right to the end.
Do you understand what gradual progress means and what foreplay means?
Wang Shanhai felt extremely tired, but also very surprised.
To be honest, the principle of battery ignition is very simple. Once it is explained, any modern person can understand it.
But this does not mean that everyone can think of this in time.
There is always an invisible gap between theory and application, which requires a long period of exploration and observation.
But now, a high school student can actually think of this method the first time he sees a battery.
This really surprised him.
When I was in high school, there were no such "practical" leaders.
What on earth do children nowadays eat to grow up? Have they all grown up to this point?
However, after looking at his sons and others, Wang Shanhai still breathed a sigh of relief.
Maybe, this kid named Wang Yu is a special case...
Wang Yu completely ignored Wang Shanhai's "tangled" look. After demonstrating the method he thought of, he went to the flywheel fire maker on his own.
He observed with great interest.
"Although this thing looks complicated, the mechanical structure is really ingenious. Inertia, friction, centrifugal force, energy conversion..."
"It does contain a lot of knowledge points. If you are not a person with rich theoretical knowledge, it is difficult to think of this."
After observing him for a while, Wang Yu looked at Wang Shanhai sincerely and sighed: "Uncle, you are really extraordinary, comparable to Teacher Ren."
After hearing this, Wang Shanhai felt a lot better instantly.
The look in his eyes when he looked at Wang Yu also became kinder.
This guy has a keen eye.
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