Chapter 385: All the power, heat, light, electricity and sound are ineffective! Genius failed! China is undefeated!

Chapter 385: All the power, heat, light, electricity and sound are ineffective! Genius failed! China is undefeated!

While patrolling the classroom, Wilson saw the strange looks on everyone's faces.

Immediately, a smile appeared on his face.

"Haha, you guys are really unlucky."

"Bruce himself set the questions for the competition."

"Then it would be strange if you could answer the question smoothly."

"You are all confused by the last question now."

When Wilson first saw this question When I asked the question, I had the same expression.

Under Li Qiwei’s guidance, including him, these instructors understood the weirdness of this question.

In just one sentence, there are three key words.

"Absolutely smooth", "spherical", "rigid body".

Students must fully understand these concepts before they can proceed with the analysis that follows.

First, absolutely smooth.

It means that there is no friction at all on the surface of the object.

In other words, if you touch the sphere with your hands, it will not have any impact on the sphere.

That is, you cannot determine whether the spherical rigid body is rotating by applying force.

Second, spherical shape.

It means that it is impossible to judge whether it is rotating through its visual movement form.

Third, rigid body.

Rigid body is an imaginary physics concept.

Its definition is: the shape and size of an object remain unchanged during motion or after being acted upon by force, and the relative positions of internal points remain unchanged.

Absolute rigid bodies do not exist in reality, they are just an ideal model.

Note that ordinary people are very prone to making mistakes regarding the concept of rigid bodies.

Objects considered "hard" are rigid bodies.

For example, steel will not deform if you hit it hard.

So steel is a rigid body.

However, this is wrong.

Even if you tap the steel lightly with your hand, it will still deform.

It’s just that the degree of deformation is too small to be detected by the naked eye.

As long as it is a system or substance composed of molecules or atoms, it will definitely deform.

Because there are forces between molecules.

This is the basis of material deformation.

A rigid body can be imagined as being composed of a whole piece of "material".

It is completely integrated, with no molecules or atoms inside.

Give a vivid example.

A spring compresses when pressed lightly.

After the hand is released, the spring will rebound again.

This is the law of material deformation in our objective world.

But now, this spring is solid. If you press it with your hand, it will not deform.

This is the concept of rigid body.

If an object has the properties of a rigid body, it will have many interesting properties.

It can be said that the understanding of the concept of rigid body is the core of answering the third question.

Wilson thought about this and smiled slightly.

His eyes were still observing everyone casually.

Suddenly.

Wilson saw a student on his right hand writing frantically.

He looked carefully and saw that the place where he answered the question was exactly where the third question was.

There was a huge shock in his heart.

“Oh, God, can someone know this question so soon?”

“Looking at his appearance, he is Asian.”

"This is indeed a land of hidden dragons and crouching tigers."

Wilson's curiosity was successfully aroused.

However, he is an invigilator and cannot show obvious expressions or movements.

So, he walked quietly to the student and pretended to look at the other student's answer casually.

At this moment, Fried Fish Brother was writing furiously, muttering something in a low voice.

"Hey, I'm afraid no one would have thought that I would use four methods to solve this problem."

"Others use one method, but I use four."

"Then I might be able to get extra points.”

Fried Fish Brother was full of confidence, as if he had everything under control.

Wilson also couldn't believe it.

"There are four solutions to this question?"

"You are better than Bruce."

I saw him looking towards the test paper.

[Solution 1: Thermodynamic method. 】

“Use a heating device to heat a fixed point on the object.”

"Then touch the point with your hand."

"If the temperature of the touched place increases, it means that the rigid body is not rotating."

"If the temperature of the touched place does not change, it means that the rigid body is not rotating. Rotate.”

[Solution 2: Optical method]

“Emit a beam of light to the surface of the sphere”

"If the sphere does not rotate, it is a normal reflection."

"If the sphere rotates, the reflected light will scatter."

[Solution 3: Electrical method]
< br>“.”

[Solution 4: Acoustic method]

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After reading Brother Fried Fish's first solution, Wilson stopped reading any further.

Because it’s all wrong.

This Asian guy didn’t understand the meaning of rigid body at all.

“Hey, I thought a real genius would appear.”

The four methods of Fried Fish Brother are all useless for rigid bodies.

Because a rigid body is not composed of molecules and atoms, it will not vibrate internally after heating.

That is, heating has no effect on rigid bodies.

Similarly, these physical means of electricity, light, and sound must interact with rigid bodies in order to achieve the purpose of measurement.

But rigid bodies cannot interact with them.

Rigid bodies only have kinematic properties.

For example, you pour a bottle of paint onto the rigid body.

Because there is no friction, the paint will not stick to the rigid body, nor will it be thrown and splashed when the rigid body rotates.

The paint will just flow down normally.

Rotating and not rotating are the same.

So it's impossible to tell the difference.

Rigid bodies cannot conduct electricity and light.

So, all the above methods are invalid.

This is also the trap of the third question.

Once you do not have a deep understanding of the properties of rigid bodies, it is easy to think of these "feasible" methods.

Wilson looked expressionless and walked away gently.

Brother Fried Fish was left there secretly chuckling. He was already imagining the scene after winning first place.

Wu Youxun, Irena, Lan Che and others saw Wilson standing next to Fried Fish Brother and paused for dozens of seconds.

I was shocked.

“Is there really a super genius in the Philippine team?”

Generally speaking, if the invigilator stops at someone's position, it means that he must be attracted.

There are two situations, either too bad or too good.

But through Wilson's expression and movements, no one could guess what was going on.

This is what Wilson deliberately maintained, otherwise it would be unfair.

So Wu Youxun and others stopped thinking about it, and the most important thing was to quickly find a way to solve the problem.

They are the strongest beings in this competition.

After getting the test paper, I quickly understood the key to the third question.

Absolutely smooth and spherical, these two conditions are simple.

Everyone among the 80 players present knew that touching it with their hands would definitely not work.

So, the key is rigid body.

This concept conceived by physicists is a very important analytical model in mechanics.

Traditional sound, light, electricity, and heat are meaningless for measuring rigid bodies.

As true genius elites, Wu Youxun and others have a deep understanding of the physics concept of rigid bodies.

But a deep understanding can only let them know that traditional methods are not feasible.

What is the real answer?

For a time, several people fell into thinking.

Now, in the huge classroom, you can only hear the sound of the pen tip rubbing against the paper.

Most of the contestants gave up on the last question.

Because if you want to get the first two questions right, it is not easy.

Instead of wasting time on the last question, it is better to do the first two questions well.

Maybe in the end, no one will know the last question.

The competition depends on the results of the first two questions.

At this moment, everyone felt that this physics Olympiad was really full of thrills and excitement.

It tests the players’ strength, but it also tests the players’ mentality.

Especially the top ones.

They are the most confused now.

There was a Filipino fish frying team in front of them, smiling crazily, not sure if they could do it or not.

But there is a lot of pressure.

Ye Qisun’s hands were even sweaty.

After that, most of the other players gave up directly. Such a decisive strategy is also very admirable.

Although the first two questions are also difficult, everyone can at least write them.

It is nothing more than the difference between scoring one point and scoring five points.

And by discarding the last question, you will have more time to do the first two questions. Although there are differences in strength among the students here.

But everyone is still the top talent.

As long as you give them time, they can eventually write it.

So, this game has reached the most critical moment.

One minute

Three minutes.

Five minutes.

After Irena struggled for ten minutes.

She gave up.

She really couldn't find the answer.

This spherical rigid body does not interact with any matter at all, so how can it be measured?

At this moment, she has not completed the first two questions yet.

She was doing the questions while thinking about the last question.

“Forget it, it seems I’m still not good enough.”

“I thought I would be first in the class every time, and I am full of confidence in this competition.”
>
“Look now, I still need to work hard.”

“But, Uncle Bruce, after the game is over, I must go and ask you the answer in person.”

"Hey."

Einstein happened to see Irena's expression at this time.

He understood the other party's choice instantly.

I have to say that this little girl is also very courageous.

He did not look down on Irena because of this.

Because this question is indeed "over the top".

Of course, strictly speaking, there is no superclass.

"Irena, I'm afraid you can't think of it."

"Even among the teachers from each country's delegation, only two people could solve the last question in the first time."

“One is me and the other is Bohr.”

"The rest was only realized after Bruce's prompting."

"The calculation of this question itself is not very difficult."

"As long as you think about it, maybe fifteen Minutes are enough.”

“The key is to have an out-of-the-box thinking”

“If you keep focusing on rigid bodies, you will definitely not be able to figure out the answer.”< br>

Thinking of this, Einstein smiled.

When the instructors and them discussed together, it was so joyful.

Finally, Bohr said:

“Only the first Physics Olympiad can ask this kind of question.”

“Because everyone is not familiar with it.”

"I think in the next few sessions, this kind of question may be a basic question."

Einstein agreed with this.

So, he believes that future Physics Olympiads will become more and more difficult.

Because the question types have been asked before, it won’t make much sense to ask them again.

So the question maker has to rack his brains.

Later, with everyone's suggestions, the Physics Olympiad was changed to once every four years, the same as the Olympic Games.

The reasons given by everyone are very good: competitions are too frequent, which is not conducive to the innovation of topics.

Li Qiwei thought for a while and realized that this was indeed the case.

The current period is indeed not suitable for high-density competitions.

In 1918, the war in Europe was not yet over.

Therefore, the time for the second Physics Olympiad was changed to July 1920.

At this time, there is only half an hour left before the end of the game.

Einstein has been shopping around for several times and has not found anyone who has answered the third question.

“It looks like the whole army is going to be annihilated.”

“Haha, but I can understand it.”

"After all, it's the first time, so it's normal to be unable to untie it."

"I'll definitely be able to untie it with one hand next time."

Suddenly, Einstein discovered that an Indian boy His face was filled with joy.

The aroma of curry smelling all over the body is impressive.

So, like Wilson, he leaned forward inadvertently.

At this time, Ranche still acted indifferently, making his teammates anxious.

However, he, who likes to be unconstrained, soon relaxed his brows.

"Huh? Yes!"

"If you can change the question a little bit, maybe you can solve it."

That's right, the brave Lan Che actually Modify the question directly.

To him, this game is just a game.

Since it is a game, you cannot be led around.

Maybe changing the title is the hidden condition?

“Suppose there are two identical balls.”

“One rotates and one does not.”

"At this time, assume that the two balls have their own axis of rotation."

"Then according to mechanical analysis."

"If the sphere is rotating, just like a gyroscope, it will move It will be more difficult to rotate the axis."

"This way you can distinguish whether it is rotating or not."

At this moment, Einstein couldn't laugh or cry.

He didn't know how to describe this Indian player.

The other party is simply more unimaginative than this question.

"However, even if you modify the question, you still have loopholes."

"How do you break it?"

"Even if it has a hinge , but still can’t exert force.”

"So, it's not rigorous enough."

"However, if you can think of this, it's good enough."

So, Einstein stopped watching.

The other party's answer may be rated 0.5 points.

During the initial discussion, the group leaders formulated very detailed and strict scoring criteria, accurate to 0.5 points.

Einstein sighed.

"It should be the end now."

"It will soon be too late."

However, miracles always come at the last moment.

There is one person who has not given up!

At this moment, Wu Youxun has finished the first two questions.

With a solid foundation, he was very good at solving the first two questions.

Whether it is calculation or formula derivation, they are his strengths.

Of course, Wu Youxun thought to himself that it would be a bit mysterious to get full marks for these two questions.

But now, he no longer cared about perfection and inspected it carefully.

The last question was his goal.

"I guess no one can solve the last problem now."

"And this is my hope."

"I want to represent the country and surpass the West, Then you can’t just rely on the first two questions.”

“So what if you get full marks? In essence, there is still no difference at all.”

"So, I can't give up."

"This time, I want the world to know China again!"

Wu Youxun cheered himself up like crazy, and even his blood began to boil.

His heart beat vigorously, as if some kind of seal was being lifted.

The power of Yanhuang bloodline!

wake!

But he was terrifyingly calm at this time.

Wu Youxun seemed to be in a dark and silent void.

He has no body, no senses, just a ball of thoughts floating around.

In front of his consciousness, no, there is no concept of up, down, left, right, front and back in this void.

A sphere emitting silvery white light floated quietly.

It seems to have existed forever.

I don’t know if it is spinning or stationary.

Thinking Wu Youxun moves around the silver ball of light.

Burst out the light of wisdom.

"Now it is certain that this ball will not interact with any matter."

"Then how to measure it."

"There is nothing else in this space except me. Things can affect the ball itself.”

“However, there must be an answer to this question.”

“With the principal’s vast wisdom, he will definitely be among everyone. Unexpected places, leaving a glimmer of hope.”

"What could it be?"

There seems to be no concept of time in this space.

Wu Youxun didn’t know how long it took to think.

But at this moment, he didn't care at all.

All the light of will is concentrated on the silver ball.

suddenly!

Buzz!

There was a soft sound, as if the space was vibrating, and Wu Youxun's mind was suddenly startled.

“How could there be a sound.”

“No!”

"No!"

"No! No!"

"Besides me, the silver ball, there is a third thing in this space."

"It was I ignored it.”

“Yes!”

"That's right!"

"Hahaha!"

"I understand!"

"I know the answer!"

Boom!

Wu Youxun opened his eyes!

My eyes are piercing the sky and the earth!

(End of this chapter)