Perpetual motion machines have been a long-cherished wish of mages for many years, but just as even the most powerful legendary mages will eventually fall, no machine or magic in this world can continue to operate without external power.

"Perpetual motion machine ......"

This is a typical civil routine, Reiner thought.

"Can we go and have a look?"

He asked, Reiner had never seen how the world designed a perpetual motion machine, and he wondered if it would make any difference in the face of the power of magic.

"I guess so, I don't see the conference room is closed."

Igor was already sitting in his chair, his eyes resting on a paper on the table, looking uninterested.

"Then I'll take a look."

Reiner didn't force Igor to pull him in, and he walked out of the office and into the conference room next door.

As soon as he walked in, Reiner saw Director Percival and Roger, both of whom were sitting on the couch, each holding a paper in their hands, and across from them, a young man was looking at the two men with a radiant expression, and he didn't notice until Reiner approached.

"Huh, what is this?"

The young man was dressed in a dress, a gown, with a gold trim embroidered on the cuffs according to the rules of the guild to signify his status as a mage of the First Ring.

He looked Reiner up and down, noticed the identity of Reiner's ring, and subconsciously thought that this was a mage in charge of chores.

"Reiner, why are you here......"

Director Percival looked up, glanced at Reiner, and then felt a little helpless.

"Forget it, you sit next to it and watch it."

He pointed to a row of chairs against the wall in the conference room, since Reiner was here, it was not convenient to get rid of him, and Percival only hoped that Reiner would not cause trouble.

"My father often mentions you, Lord Orsen, and he says that you are a promising mage who may even advance to the higher ranks in the future."

The young man didn't notice the whispers of Percival and Reiner, and he said quietly while the two judges reviewed the papers.

"It's over, Mr. Duravin, I'm just doing my duty."

Percival replied, putting down the paper, as if he had already figured it out.

"Well, isn't the 'Eternal Pendulum' I designed very innovative, using such a simple method to solve a problem that has plagued mages for thousands of years, to be honest, I didn't expect me to be so smart."

The young man asked again, his words revealing an indescribable arrogance.

"Haha, I feel like Reiner. I don't know if he, who is known as the most promising advanced high-level mage in the past fifty years, will have a cognitive collapse and explode on the spot when he sees my thesis. ”

He was open-mouthed, and it was clear that his father, who didn't know where he came from, probably hadn't taught him to keep a low profile.

Hearing this Mr. Duravin's words, Percival smiled helplessly, did not explain more, but waited for Roger next to him to finish the review.

It was about five minutes before Roger, with his glasses on one side, put down his paper.

"Roger, you tell me your opinion first."

With Duravin in his expectant eyes, Percival asked Roger to judge first.

Roger picked up the paper again, looked at it, and continued.

"The design in this, well, is indeed somewhat innovative, and there have been few examples in the past......"

"Right, I'll just say, this is a unique design, and you're witnessing history!"

Duravin said impatiently, his voice full of excitement.

"Uh, but ......"

Roger paused, and he glanced at Percival before continuing.

"But this design, I don't think it can achieve the ability to continue to operate permanently without any external energy supply, this is not a perpetual motion machine."

Roger's words made Duravin's eyes widen in disbelief.

He was stunned for a long time before he spoke, his expression a little gloomy.

"Sir, I suggest you re-read one side of my paper, I'm sure you'll have a different opinion."

"Actually."

Director Percival spoke at this time.

"I also think that the design here is very flawed, far from perpetual motion."

The attitude of these two people surprised Reiner, he thought that according to Igor, they were all fools here, maybe Director Percival would pass the other party's paper against his will because of the power of Duravin's father, but he didn't expect that these two people still maintained the basic quality of a mage seeking truth from facts.

"You don't understand the mystery of this!"

Duravin's otherwise polite image immediately collapsed, and he banged on the table, arguing disapprehantly.

"Come and see."

Director Percival suddenly turned his head and handed Duravin's paper to Reiner.

"Uh, okay."

Reiner didn't know which one was singing, but in the morning, Director Percival told him to do his job and not be nosy.

He took the paper and soon saw the design of the so-called perpetual motion machine.

It was a roulette wheel with an average of twelve sticks of equal length, and at one end of the stick was a small ball, and when the wheel rotated, the ball on one side would move away from the axis due to the centripetal force, and the other side would be close to the axis, so that it seemed that it could maintain its eternal motion by the transformation and inertia of the centripetal force.

"How is it possible for a one-ring mage to understand the subtleties of my design, Mr. Percival, listen to me......"

"Of course it can't be a perpetual motion machine."

Reiner interrupted, and before Duravin could retort, he continued.

"It seems to work continuously, but in reality, the number of balls on the left and right sides of the reels is not the same, and if you build a mathematical model, you can get these equations......"

He quickly began to write on the blackboard in the conference room, built a series of equations, and finally got the same answer to the equations on both sides by means of substitution and elimination.

"In other words, when this condition is reached, the whole machine will stop because of the balance of forces, which proves that this design is not a perpetual motion machine, it is a simple mathematical calculation, and the level of mathematics required is not even more than the second ring, I don't know why this Mr. Duravin didn't do the calculation himself."

Reiner put down the chalk, and he saw Director Percival's eyes widen slightly, the calculation was obviously somewhat unexpected to him.

On the other side, Duravin's face was flushed, and it was obvious that Reiner's use of mathematical means to completely negate his thesis had made Duravin feel that he had been greatly humiliated, and his hands trembled slightly, and he was about to explode.

"Who are you to question me like that?"

He asked in a deep voice, gritting his teeth.

"Reiner. Ian Gray, if memory serves, you're still going to blow my head off? ”

Putting down the chalk, Reiner patted the chalk dust on his hands.