At half past ten o'clock in the evening, the bell rang all over the laboratory building.

The bell-wiggling janitor walked to the top floor and found that it was still brightly lit and full of people, and a group of students and professors had no intention of resting.

In the afternoon, the principal appeared, and Charles arrested him to mobilize everyone, and the students who were arrested later were immediately full of energy.

Charles walked through the laboratories of each team with a small notebook, recording the progress of today's research, as well as tomorrow's plans and areas that needed help to coordinate and coordinate.

He doesn't want everyone to stay up late, and practice has proved that a good rest can improve the efficiency of scientific research.

After recording the situation of each group, he drove everyone to the restaurant for supper, then went back to sleep, and came to have breakfast at half past seven in the morning.

Finally, in the laboratory where the water spray is studied, Nick Collins, the handsome boy who confidently claims that he will soon be able to solve the problem of the ring magic circle at lunch, is standing in front of the blackboard, holding a teaching whip to explain to his classmates what needs to be modified in the magic circle.

Charles didn't bother them, and stood by and listened quietly.

I have to say that the level of this Collins classmate is still very good, and in less than a day, he has clearly distinguished several parts such as the energy distribution and transmission system and the work system of the ring magic array, and is ready to start modifying the part of the magic array that works on the wind to work on water.

You must know that the ring magic array is produced by the demon race, and the style of the magic array is different from that of humans, so it is not easy to analyze the meaning of each of them.

As for the strength effect, theoretically speaking, as long as the work part is replaced, the hair dryer can be turned into a water spray pipe.

Actually, Charles just looked at everyone with an encouraging smile, and there were some questions that he wouldn't have experienced if he hadn't missed them once.

When Collins' explanation was over, he had already seen Charles watching, but his expression was a little unpleasant.

That expression reminded him of his deceased grandfather, who was smiling and watching himself talk about the magic circle he had invented, and then mercilessly picking out a whole bunch of mistakes.

He asked, "Medivan, do you have any opinions on this magic array?"

Charles still had that grandfather-like smile and said, "I think what you said is right, it's not early, let's eat something and go back to sleep, it's a big deal that we let Professor Babbage pull the boat." ”

Then he came over to help Brother Glasses solve the structural calculation problem, and at this time, Professor Babbage, who happened to pass by the door, grabbed this guy with a dragon's claw and threw it out of the window.

The roof of this laboratory building is the perfect place to peek into the girls' bathroom, and when a certain person is thrown out, he flies straight in the direction of the bathroom......

Fortunately, someone had practiced the wind wing technique hard to escape, otherwise he would have flown into the bathroom through the ventilation window at the top of the wall.

Charles, who escaped, didn't dare to go back, so he went straight back to the gym and went back to the dormitory to take a shower and sleep after finishing tonight's workout.

Tarantura, who had previously lived here, had moved out, and the magazine publisher had built several warehouses as printing houses, and she and her magazine staff had rented a house nearby for housing and offices, and the landlord was a fishing guy who knew Charles well.

Vichy got a house janitor's pass for Tarantula so she could enter and leave the academy freely? Come back here to stay.

But is the first issue of the publisher's magazine ready to be released? She is staying at the printing house every day now, and she will not be back for a short time.

Finished today's workout? Charles, who had taken another shower, decided to walk back to the boys' dormitory tonight? The wind is cool tonight, and the night sky is starry.

Soon? The island will be shrouded in fog on autumn nights, and you won't be able to see the stars in the sky at night.

Passing by the Lab Building? There is also a room on the top floor with lights on.

Charles flew to the windowsill? I saw a person holding a cup of tea, looking intently at the circular magic circle on the blackboard.

"Got a problem?" he asked.

Collins didn't turn his head and replied, "I always felt that something was wrong, and my intuition told me that the speed of the water might not be up to the mark?" But I didn't find anything wrong. ”

Charles just noticed the problem in the magic circle? This is indeed a small problem that hits newcomers, so I used the hand of the mage, picked up a piece of chalk in the air, and wrote a formula in the empty space of the blackboard:

E?=?mv2

The kinetic energy theorem is also taught in this world, but it is mostly used for research such as bows and trebuchets? It is rarely used in the study of magic circles.

In the past, the magic array emitted formed magical elements? It is not a substance in the traditional sense, and the relationship between magic and the speed of motion of the elements is calculated by another formula.

Aside from a few ice and earth/stone spells? The kinetic energy of the magic element is not important, and few people think about it.

And this wind-blowing, water-spraying circular magic array is different from the previous magic array? Does it rely on the elements to do work to drive the medium of wind or water? Therefore, the scope to be considered is different from the previous magic array.

Analogy? The magic circle of the hair dryer is to kick a normal soccer ball out, while the water spray is to kick a soccer ball filled with water out.

With the same force, a soccer ball full of air will fly fast and far, while a soccer ball filled with water will naturally not fly so much, and more often than not, it will roll on the ground for a distance.

What Collins just said was just replacing the part of the magic circle that does work on air with work on water, but the distribution and output system of magic power has not changed, it's like filling a football with water, but the power of the leg that kicked the ball has not changed at all.

Bishop Rurika encountered this problem back then, and the researcher joked that he thought that the water spray could "spray three meters against the wind", but it turned out that he could not even "wet the upper of the shoe".

"I see!" Collins quickly understood the meaning of the kinetic energy formula on the blackboard, "If the magic output in the magic circle does not change, then the speed of the water will become very slow when working on water with a mass much greater than air, right?"

After he finished speaking, he wrote a formula on the blackboard, calculating that under the theoretical conditions, under the same magic energy, the velocity of air with a density of about 1.3kg/m3 at the outlet is v?, and the velocity of water v?=0.036v??。

"Theoretically, mana output would have to be increased by almost 28 times to reach the speed of the wind, isn't that true?" he turned his head to look at the window, but there was no one, and Charles slipped away after writing the formula.

In someone's opinion, his thinking is correct, even if he doesn't find any negligence now, he will analyze it because of the lack of water spraying in the water spray after making a model for testing tomorrow.

However, since Collins is vaguely aware of this problem, Ru doesn't mind incarnating as an old grandfather to push the young man forward to make him avoid detours.