Entering the venue, Wang Mai lifted the wooden sewer cover and nodded with satisfaction. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 info Last night's rain was not small, and it didn't stop until the morning, but he didn't expect that the water in the venue was almost drained in less than two hours, and the speed was much faster than he expected, and the topography of the venue was undoubtedly revealed.

Looking up from below, there are still migrant workers in the stepped auditorium who are installing the awning. Wang Mai didn't dare to roof this venue, one was afraid of, and the other was not easy, time-consuming and laborious, so he had to install high cloth canopies on the rows of seats.

Wang Mai stood on the podium, and the cool breeze blew, which was an unexpected benefit brought by the echo wall. Unexpectedly, in addition to gathering and transmitting sound, this sound bar also played a role in promoting air circulation in the venue. I just don't know how much of this effect will be left after the audience enters the venue.

There is a long entrance tunnel in the middle of the auditorium, and there are also two narrower arc passages under the sound bars on both sides, three of which are large enough for the audience to enter and exit.

It's just that the people of Guozijian are still quite unaccustomed to such an upside-down arrangement, but in order to achieve the effect, they have to adopt such a design.

While explaining the design of the venue to Li Chunfeng, Wang Mai took him to turn the entire venue. At this time, the crowd began to enter the venue one after another, and many of them were scholars who were invited to come from other places, these days, in addition to touring around Luoyang City, these people gathered in Guozijian to discuss knowledge together, but because Wang Mai had been busy preparing for the construction of the venue for a while, most of them did not know each other.

After Kong Yingda took the Yan family into the arena and sat down, Wang Mai took Li Chunfeng and two disciples to the stage, and Liu Da had already led someone to move a long wooden chute to the podium, and there was a drip timer next to it.

"Ladies and gentlemen," Wang Mai stood still on the podium, and the hundred and ten scholars sitting below also fell silent, "now I will demonstrate an experiment for you to explore the relationship between weight and velocity. This is the first time he has spoken on stage in front of so many people, and he is still a little nervous.

The crowd that had just quieted down erupted into a small and fragmented sound of each other's ears, Kong Yingda stood up: "Everyone be quiet, this person is my country's assistant professor Wang Jikai, and listen to what he says." ”

Only then did the crowd quiet down, and they looked at Wang Mai curiously, not knowing what he was selling.

Wang Mai took a few deep breaths to calm his mood, and arched his hand at Yan Qinli in the second row: "Can you please Brother Qinli get up and answer me a few questions?" ”

Yan Qinli stood up very cooperatively and returned the salute: "Please teach Assistant Wang." ”

"I have an iron ball here, and now I slide down from one end of the wooden trough, if the wooden trough is divided into two sections, Brother Qinli, do you think that the iron ball has experienced exactly the same amount of time in these two sections?" Wang Mai asked, holding the iron ball.

Yan Qinli thought for a while, and arched his hand and said: "I haven't considered this issue in Xia, so I have no way of knowing, but I boldly guess that the time of these two periods should be the same." ”

Wang Mai nodded and asked Yan Qinli to sit down, and then arched his hand to the audience and asked, "Do you agree with Yan Qinli's point of view, and those who agree, please raise your hand." ”

There was another head-to-ear discussion in the audience, and after a while, most of the people raised their hands in agreement, and Wang Mai even raised his right hand to Li Chunfeng beside him.

"This gentleman," Wang Mai saluted a person in the front row who did not raise his hand, "may I ask why the gentleman did not raise his hand, do you have any other opinions?" ”

The man, who was about fifty years old, shook his head when he heard this: "It's really hard to make a decision here, so I didn't raise my hand." ”

"Does that gentleman have any other opinions?"

"Nope." The man shook his head and said.

"Okay, then I'll solve this question for you now." Wang Mai nodded at Liu Da and motioned for him to start.

Liu Da walked to the high end of the chute, holding an iron ball in his hand and putting it on it, with Wang Mai's "start", Liu Da let go of his hand, and Wang Eryue and Liang San next to him also began to stare at the timer and start timer.

The iron ball quickly rolled down to the low end, and Wang Er opened his mouth to report the time to the audience: "It took about six drops of water." ”

Wang Mai nodded and said to the audience: "This is the time of the whole process, and the following two distances will be experimented separately, in order to ensure the accuracy of the experiment, three tests will be carried out separately, and the average value will be calculated." ”

The scene was very quiet, and when the iron ball rolled down from the wooden trough just now, many thoughtful people found that the rolling speed of the iron ball in the second half was obviously much faster than the first half, and the initial thoughts in their hearts gradually wavered.

Sure enough, the data of the first three tests came out, and the time when the iron ball rolled through the first half was basically stable at the moment when the fourth drop of water had just dropped. There was another whisper of discussion in the crowd, and it was clear that such a result had caused quite a stir.

"Everyone, be quiet," Wang Mai's voice came again, "There is a red line in the middle of the wooden trough, and when the iron ball rolls down to the red line, the timer will begin, and if you have no objection, it will start now." ”

After a while, the results of the last three tests also came out, and the time was frozen in two drops of water, and the crowd was in an uproar, which obviously subverted their common sense.

"Obviously, the ball rolls faster and faster, so the first half and the second half don't take the same time." "Then let's do a few more experiments and raise the slope of the wooden trough to prove this." ”

Soon, the results of several experiments came out, and as the slope got higher and higher, the time for the iron ball to slide down became faster and faster.

"This shows that in the process of the iron ball rolling down, it is constantly accelerating." Wang Mai said, "Do you have any objections? ”

After some discussion, the crowd felt that Wang Mai was reasonable and agreed with the process.

"Since you have no objections, let's move on to the following experiments." Wang Mai held up an iron ball, "This iron ball is bigger and heavier than the one just now, do you think the time to roll down is shorter than the small iron ball just now?" ”

This time everyone raised their hands, no exception.

"It seems that everyone thinks that the heavier the weight, the faster the speed of the roll, and the following is still proved by experiments." Wang Mai said with a smile.

The wooden chute returned to the first slope, as soon as Liu Da let go of his hand, everyone stared intently at the falling iron ball, and the iron ball landed with a sound, and then focused on the fat Wang February.

"Six drops of water." Wang Eryue shook his throat a little nervously and reported the number.

"What?" Rao is full of elderly scholars, and he can't sit still at this time.

"Then let's do a few more verifications to see if there are any errors." Wang Mai's voice temporarily suppressed everyone's suspicions.

The second time, it was still six drops of water.

The third time, or six drops of water,

……

The trial was conducted six times, and the results were the same each time.

Wang Mai changed the slope a few more times, and the result was almost exactly the same as the first small iron ball. Everyone was silent at this moment, and this experiment undoubtedly gave everyone an unexpected result, and everyone was pondering the truth inside.

"Obviously, the rolling speed of the iron ball has nothing to do with its weight, but has a direct relationship with the slope." Wang Mai pointed to the top of his head, "Everyone, please look up." ”

Liu Da didn't know when he stood above the podium, with a vertical echo wall under his feet, holding the two iron balls just now.

"You can see that there is a red silk tied between these two iron balls, and later my guard Liu Da will release these two iron balls at the same time to let them fall at the same time, this distance, you can see it as a completely vertical slope. According to the speculation just now, although the weight of the two iron balls is different, they will fall to the ground at the same time. After speaking, Wang Mai flashed to the side and waved his hand to Liu Da above.

Everyone stared intently at the two falling iron balls, and with a crisp sound, the two balls landed at the same time and smashed on the stone slab of the podium.

"I see." The crowd had already dispersed, but Li Chunfeng happily repeated the experiment over and over again, until the sun rose very high, and then stopped and walked to Wang Mai's side.

"What do you understand?" Wang Mai hid in the corner to enjoy the coolness, and the cool breeze from the echo wall continued to blow on his face, which was very refreshing.

"The distance at which the iron ball rolls is squared." Li Chunfeng said excitedly with a stack of scratch paper.

Wang Mai nodded, and the acceleration really couldn't help this guy with an explosive IQ: "What else?" ”

"The acceleration value of the copper ball falling vertically is a fixed value, which is about three feet, six inches and five minutes per drop." Li Chunfeng said as he flipped through the scratch paper.

Wang Mai took the abacus and calculated, his self-made drip timer, each drop of water is about one second, converting three feet, six inches and five minutes into a modern scale, exactly 0.974 meters per second, and the gravitational acceleration in later generations is about 0.98 meters per second, which is very close.

"There's something you want hidden in these experiments." Wang Mai stood up and handed the abacus to Li Chunfeng, "I've sent it to you." ”

Li Chunfeng lowered his head and held the abacus, not knowing what Wang Mai meant in his words.

"Let's go, it's time for lunch." Wang Mai urged him at the front.

Li Chunfeng walked to Wang Mai's side in three steps and two steps: "What truth is hidden in this?" Why don't you tell me directly? ”

Wang Mai stopped and sighed: "Don't ask me this question, I won't answer it." If you want to solve the mystery of the sea of stars, you must rely on your own strength, I will say what should be said, and I will not answer a word when I should not say, do you understand? ”

"Why?" Li Chunfeng still did not give up.

"If these truths come out of my mouth, they are like a tree without roots and water without a source, no different from a house without roots, it will not be able to withstand the wind and waves, do you understand?" Wang Mai turned around and continued to walk forward.

Didn't anyone say that? The meal should be eaten one bite at a time, and the steps should be taken step by step, if it is too big, it is easy to pull the eggs.

"I still don't understand why you're like this, but one day, I'll uncover it with my own hands." Li Chunfeng raised his head and said to Wang Mai's back.

"Got it," Wang Mai waved his hand, "eat, starve to death." ”

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