Chapter 106: Mental Arithmetic Seconds Answer, How Can You Be So Fast?

Ku Huiyi: "......"

Hu Yidao: "......"

And Li Jin: "......"

Suddenly, all three of them were stunned.

Don't ask why, just because Lin Bei's answer was so fast, it was unbelievable, and the answer was very correct, it can be said to be reasonable, and there is no possibility of refutation.

Don't say that Ku Huiyi is the one who produced the paper, he already knew the answer, Hu Yidao and Li Jin are physics teachers, and they can understand it at all.

Even if it was the Yellow Formation Diagram, Cao Dahua and several surrounding metamorphosis teachers couldn't help but understand and nodded.

Lin Bei replied, it's fast and accurate, amazing!"

"Although we have not been exposed to physics for many years, we have also realized that the answer is indeed C."

Originally, Li Jin, Huang Zhentu and Cao Dahua were not very confident in Lin Bei's strength, and they were full of worries just now.

Can ...... now

But as if he had eaten most of the reassuring pills, he looked at Lin Bei's eyes, and it was a burst of light.

"Maybe ......"

"This kid really wasn't bragging."

"It's that he really has that strength, a pseudo-scumbag."

"He is disguised to have a zero score in the test on weekdays, but this time the full score of the comprehensive is the real himself?"

In just an instant, Li Jin, Huang Zhentu and Cao Dahua's worries about Lin Bei disappeared, and their hearts were full of expectations.

Only Ku Huiyi still stared at Lin Bei with wide eyes, staring at Lin Bei in disbelief: "You, have you done this question before?" ”

"Nope!"

Lin Bei shook his head directly.

"That'...... So how can you be so fast? ”

Until this time, Ku Huiyi was unwilling to believe the facts.

This first question is a multiple-choice question, and it is not too difficult, but it is really difficult to answer the question in seconds.

There are thousands of high school students in a big third middle school, and there are no more than a few high school students who can reach Lin Bei's speed.

But when Lin Bei heard this, he said seriously: "Didn't I just say it, this question is too simple, it is all about releasing water and sending sub-questions, you can know the answer at a glance, how can you not be happy?" ”

"Poof......

Hearing this, Ku Huiyi almost couldn't help but spurt out another mouthful of backblood, only feeling a little injured.

It's really ......

It is very lethal and more insulting.

Lin Bei's mouth can be angry in minutes, like a white knife entering and a red knife coming out, it is almost life-threatening.

"Good, good!"

"A good one is a good one to send water and send points, a good one is simple, and a good one can know the answer at a glance."

"But Lin Bei, this first question is really simple, and you have the ability to continue, how do you say this question should be chosen?"

Ku Huiyi did not believe in evil and pointed to the second question of the test paper.

Saw......

[2: The Tang Dynasty's "Lai Yun Jing" recorded that one of the advantages of the Quyuan plough over the straight plough was the soil and labor.

Let the oxen pull two kinds of plows separately by the tillage line with a tensile force F of equal magnitude, and the angles between F and the vertical direction are a and p, a < p respectively, as shown in the figure, ignoring the quality of the tillage line, in the process of plowing the land, the following statement is correct ().

A: The horizontal component of the pulling force of the plough is greater than that of the plough.

B: The vertical component of the pulling force of the plough is larger than that of the plough.

C: When the curved plough advances at a uniform speed, the tensile force of the plough rope to the plough is less than the tensile force of the plough to the plough.

D: When the straight plough accelerates, the pulling force of the ploughing rope on the plough is greater than the pulling force of the plough on the ploughing cable. 】

This is a question about force decomposition.

It is also not very difficult, but it needs to be decomposed by drawing and using trigonometric functions to calculate the magnitude of various forces.

This process, a minute or two is still required.

If you don't believe me, you can give it a try.

It looks very simple, but it can be done, but if the foundation is not solid, it is really necessary to be dizzy.

However, Lin Bei still didn't think about it, and replied directly synchronously: "It's still very simple, the answer is B." ”

"Since the forces are the same, and the relationship between the magnitude of the angles is a < p, according to the trigonometric function, it is easy to conclude that the horizontal component of the plough on the tensile force of the plough is smaller and the vertical component is larger, so the B term is correct and the A term is wrong."

"Since the pull of the plough on the plough and the pull of the plough on the plough are interaction forces, the two forces are equal in magnitude and opposite in direction, regardless of the state of motion."

"So the CD options are all wrong."

The words are sonorous and the landing is sound.

Ku Huiyi: "......"

Hearing this, he was sluggish again.

It's just because Lin Bei's answer is right, and not only right, but more importantly, the speed is extremely fast.

Do you really seem to be able to see the answer at a glance?

Wrong.

It can't be said that the answer is seen.

It's that Lin Bei's thinking works extremely fast, and he doesn't need pen and paper, but calculates everything directly in his mind.

This means that Lin Bei's basic physics skills are absolutely solid to the extreme, and various formulas can be easily pinched.

Not to mention other subjects, at least in physics, Lin Bei is definitely a top student.

That's right, it's the top student.

Although only two questions have been done, sometimes, you can see the whole leopard at a glance, and know the late autumn when you see a leaf.

It's not terrible to get the two questions right, but it's terrible to get them right, which is amazingly fast, which is unheard of.

Or, Lin Bei is a top student.

Or, Lin Bei knew the answer in advance.

However, the second guess was directly passed by Ku Huiyi, and it was impossible for Lin Bei to know in advance.

After all, he came up with the question, and only he knew it before that, and he hadn't even read the team leader Hu Yidao.

It's impossible.

It is even more impossible to leak the question to Lin Bei.

"So ......"

"Lin Bei is really a top scholar, and even a god?"

"And I'...... Did you really misunderstand him? ”

In an instant, this incredible idea also came to Ku Huiyi's mind.

Eliminate all impossibilities, and even if the rest is impossible, it is the truth, and he can't help but think about it too much.

But the next second.

He shook his head again and again, "Impossible, absolutely impossible, how can a student of water be a scholar or a god?" ”

Ku Huiyi gritted his teeth, suppressed the thoughts just now, and pointed to the third question on the paper with a trembling hand. "Lin Bei, you ...... Which one do you choose for this question? ”

The question types are as follows......

[2: In April 2021, the core of China's self-developed space station was successfully put into orbit.

If the orbit of the core module around the Celestial Continent can be regarded as a uniform circular motion, the gravitational constant is known, and the mass of the Celestial Continent can be calculated from the following physical quantities ( ).

A: The mass of the core module and the radius around the ground,

B: Mass of the core module and the period around the earth.

C: Angular velocity and period around the core module.

D: Earth-orbiting velocity and Earth-orbiting radius of the core module. 】

It's a space-related question.

It can also be said to be a problem of gravitation and celestial motion, but this is replaced by a space station.

difficulty, still not much.

It's just a few basic formulas.

But it must take a minute or two for an average person to do it, after all, he always has to write the formula again, right?

No, I have to convert the formula to a certain extent, and then substitute the four options to verify them one by one.

Then, it will take even longer.

Maybe it won't take three minutes, and you won't be able to get down.

And even if it takes three minutes, the accuracy rate is five or five.

But Lin Bei only glanced at it, and then spoke directly: This question is also very simple, and the specific process will not be said, anyway, everyone who knows knows it, don't waste time. ”

"As for questions 4-7 in the back, choose ACDB respectively, and choose 8-10 questions, which are BD, BC and AD."

"The fill-in-the-blank answer to question 11 is 6.04 and 6.06 in the first question, 3 in the second question, and 48.6 in the third question."

"What is tested is nothing more than the application of Hooke's law formula, as well as the transformation of functions."

"And the answer to question 12 is ......"