"Twenty years ago, there was an unstar body in the universe, which caused the aura in the universe to recover, the shackles on the earth were opened, and every matter in the universe became a cultivator, and the level difference between each cultivator was huge.

Because there are many organisms on the earth, the earth is the hottest planet in the entire universe.

......”

The history teacher, Sultan, the head teacher of their class, was speaking from the podium that she had already told a million pennies, and the other students were tired of listening to history, which made the students drowsy.

......

"If a person in the Earth Soul Realm Tribulation Period is standing in a thirty-meter-high building, and there is an enemy standing a hundred meters away from him downstairs, and the cultivator is holding a dart in his hand at this time, if he wants to use a dart weighing 0.5 kilograms to fly horizontally above the enemy's head and kill him, how much physical energy does this person need to consume?"

Next, I will select one of my classmates to answer this question for me. ”

At this time, Zheng Jiayao began to rejoice.

"Teacher, teacher, call Chen Nan to answer, he was the first in the school last time, how could he not answer?"

Hey, hey, hey.

The last time she was humiliated like this, she already held a grudge against Chen Nan, and tried her best to dismiss her face.

The first place in the whole school, not by cheating?

If you can't solve this problem, I see how you can pretend to be forced on me.

"Well, that makes sense, Chen Nan, you can answer it. ”

"Oh. Chen Nan stood up without caring at all, "This kind of topic is simply an insult to IQ." ”

"Yo, you're pretty awesome, aren't you? ”

"Just answer it. ”

Chen Nan said, and then secretly made small moves behind his back.

Fortunately, he was in the last row, and there was no one behind him, so he wouldn't be found out if he was doing small things at all.

Then he pulled the screws out of his watch.

At this time, all the other students stiffened and did not move.

Then Chen Nan took out his mobile phone unscrupulously.

"A wave of little ape search questions!"

Chen Nan walked up to the podium and saw that this question happened to be on the teacher's handout.

"I guess you can't come up with a problem yourself. ”

Chen Nan picked up his mobile phone, and the little ape searched for the question, and the answer came out.

The answer covers the whole question in its entirety.

If there is an enemy 100 meters in front of him, and the cultivator is standing at a height of 30 meters, if he flies the dart horizontally, the dart will be thrown horizontally, and the trajectory of the dart can be broken down into vertical and horizontal directions.

Vertically, according to the law of free fall, h = 1/2 gt², that is, the height from the ground is equal to the acceleration of gravity multiplied by the square of time divided by two. The height is known, the gravitational acceleration g=10m\/s², and the value is substituted to find the time it takes for the dart to fall from a tall building to the ground from 30 meters, and the time is equal to the root number 6

Horizontally, according to x=vt, that is, the distance traveled by the dart is equal to the initial velocity multiplied by the time of falling, substituting the time that has been found in the vertical direction at 300 meters and the vertical direction, and the velocity = 50 times the root number is 6m\/s

Because the velocity of the dart is generated by the acceleration at the start, the acceleration a = 50 6m/s².

According to Newton's second law, the force exerted on physics is equal to the mass of the object multiplied by the acceleration, so the force required to fly out of the dart is equal to m*a, which is equal to about 55N.

If a person in the Earth Soul Realm Tribulation Period wants to exert the power of fifty-five oxen, he needs to consume ten percent of his energy, which is about 1,500 joules.

"It seems that the answer is well analyzed. Chen Nan was happy alone.

And then.

"Hey, hey, Zheng Jiayao, you're very shy, aren't you?" Chen Nan smiled strangely at the still Zheng Jiayao, and then slowly walked to her place.

At this time, her eyes were fixed on the podium, without blinking, her face was expressionless, and her whole person did not move.

"I heard you're very dragged?" Chen Nan pinched her face and looked at her while saying, "You haven't had enough fun, have you?" Okay, then you can come." ”

Then, Chen Nan opened her physics workbook.

Then, he picked up Zheng Jiayao's red pen.

Brush! Brush!

All the forks and forks were hit at will.

Even the questions that have not been done later have been crossed one by one.

"Perfect!"

When he was done, he returned to his seat and wrote down the questions he had found on scratch paper.

Then he pressed the screws of the watch.

Everything around is back to normal.

Just now, Chen Nan walked around the class casually, except for Chen Nan, no one noticed it.

"Let me make a draft. Chen Nan pretended to pick up the scratch paper.

Brush brush brush.

After a wild calculation, others really thought he was working on a draft.

"I've figured it out!"

Chen Nan put down the pen abruptly, and then picked up the scratch paper.

"If there is an enemy 100 meters in front of him, and the cultivator is standing at a height of 30 meters, if he flies the dart horizontally, the dart will be thrown horizontally, and the trajectory of the dart can be broken down into vertical and horizontal directions.

Vertically, according to the law of free fall, h = 1/2 gt², that is, the height from the ground is equal to the acceleration of gravity multiplied by the square of time divided by two. The height is known, the gravitational acceleration g=10m\/s², and the value is substituted to find the time it takes for the dart to fall from a tall building to the ground from 30 meters, and the time is equal to the root number 6

Horizontally, according to x=vt, that is, the distance traveled by the dart is equal to the initial velocity multiplied by the time of falling, substituting the time that has been found in the vertical direction at 300 meters and the vertical direction, and the velocity = 50 times the root number is 6m\/s

Because the velocity of the dart is generated by the acceleration at the start, the acceleration a = 50 6m/s².

According to Newton's second law, the force exerted on physics is equal to the mass of the object multiplied by the acceleration, so the force required to fly out of the dart is equal to m*a, which is equal to about 55N.

If a person in the Earth Soul Realm Tribulation Period wants to exert the power of fifty-five oxen, he needs to consume ten percent of his energy, which is about 1,500 joules. ”

"Also, the unit of this energy has now been changed to Chen Nan, don't read it as one thousand joules in the future, read it as one thousand Chen Nan, the abbreviation of the unit is cn, understand?"

"Also, I said why are you so troublesome, if you want to kill that person, just jump down and slash it, it's really troublesome. ”

Chen Nan said seriously, saying that their scalps were numb.

"Well, that's good. The physics teacher nodded with great satisfaction, "It seems that Chen Nan did not cheat." ”

"Zheng Jiayao, what do you say?"

What? You made such a difficult question?

Zheng Jiayao felt unbelievable, how could Chen Nan do this.

"Teacher, it's time to ask Zheng Jiayao to answer the question, she hasn't won the fourth place before, but this time she actually has the fourth place, he must also be cheating!"

At this time, Chen Nan began to rebel.

"Well, that's right. ”

"Zheng Jiayao!" the physics teacher ordered with a serious face, "You, answer the question for me!"

E, no

"Uh, okay. ”

"Yesterday, I just told you about Einstein's theory of relativity, and I also told you about special relativity and general relativity, and now, you will tell me the definition of relativity!"

At this time, Zheng Jiayao was speechless.

"Phase...... The theory of relativity was discovered by Albert Einstein, who ...... He ......"

Zheng Jiayao just said a word, and he couldn't say it!

"I can't say it, right? It seems that Chen Nan is right, you really rely on cheating. ”

"No, no, it's not like this, teacher, listen to my explanation!" Zheng Jiayao hurriedly waved her hand.

"Explain what?"

"Chen Nan may not be. ”

Hmph! Yesterday in physics class, I saw that you were sleeping in a big sleep, and the teacher gave such a lesson, and I want to see how you can do it. Die to die together!

Besides, I didn't cheat at all!

"Oh, is it?" but Chen Nan asked disappreciatively.

"Chen Nan, will you do this question?"

"Easy!"