After a few days, Wang Jingxiu and their group of members who studied gravitational acceleration were also close to success, they had already come up with the acceleration value and the formula of free fall, and the experiment in Wangjialou was accurate several times, and today they called Wang Haoran to go to the cliff of the back mountain to do experiments to see if this formula is also applicable to the free fall motion at a higher position. Pen, fun, pavilion www. biquge。 info

Wang Haoran felt that it was unnecessary, he saw that Wang Jingxiu and the value they came up with was 9.7, so he could be sure that their research results were basically correct. It's still a little bit close, but at the current level of timing, it's already very rare. If he has to pursue accuracy, then the result of 9.8 is not the correct value, so he doesn't plan to break it, if he does everything perfectly, then let others study something? So what else is there to do research for? So how do you cultivate talents?

"Let's go experiment, didn't you say that you should use practice to derive theories and apply theories to practice?" Wang Qihong said as he pulled Wang Haoran to the back mountain.

When everyone came to the back mountain, Wang Jingxiu and Yu Yuyao climbed to the top of the mountain and found a big rock. For the sake of safety, Wang Jingxiu tied Yu Yuyao's waist with hemp rope, and tied the other end to a big tree, leaving an appropriate length. Yu Yuyao cautiously came to the edge of the cliff, holding the big stone with both hands, and Wang Jingxiu waved to the people under the cliff to signal that they were ready.

At this time, Wang Qihong had already set up the pendulum clock, moved the second hand of the pendulum clock to the zero position, and turned the pendulum aside with one hand to wait for the signal. When he saw that the people on the cliff were ready, he asked Yu Zhaoyun to take out the cupola cannon and light it.

Wang Haoran knew that they wanted to use the explosion of the cannon as a signal, and they didn't stop it, so it was better for them to find out the problem by themselves.

With a bang, Wang Qihong and Yu Yuyao let go almost at the same time, and when the stone hit the ground, Wang Qihong, who was ready at any time, hurriedly grabbed the pendulum.

"Two six." Wang Qihong gestured to the position of the pendulum and muttered.

After they did two more experiments in the same way, Yu Yuyao took a bundle of rope handed over by Wang Jingxiu, grabbed one end and lifted it to the height of the stone just now, and threw the rest off the cliff. Wang Qihong aligned the length of the rope below and cut it, and this rope was the distance that the stone had fallen.

After Wang Jingxiu and the others came down, he nervously asked Wang Qihong what the height he had calculated.

"The results calculated by the three experiments are all around 32.8 meters, a difference of no more than half a meter." Wang Qihong asked Wang Haoran again, "Do you think it's accurate?" ”

"The actual height is definitely larger."

"Why are you so sure?"

Wang Haoran smiled but did not answer.

When the length of the rope was measured, the result was indeed as large as Wang Haoran said, 35.8 meters, and everyone was suddenly a little discouraged.

Why is that? With this formula before, the experimental results will not be worse than one meter! Wang Qihong asked Wang Haoran.

"You use gestures to make a signal, and then try to know."

Wang Qihong saw that Wang Haoran didn't want to say more, so he simply did what he said, and he didn't know if he didn't do it, so he was startled when he did it. The height of the first experiment was 35.3 meters, which is quite accurate. Then they did it a few more times, and the results were all about the same, and this time they were completely excited, and the boring experiment of months was finally over!

"Why can't you use a cupola, but you can't use gestures as a signal?" Yu Yuyao wondered.

"It's the time difference." Wang Qihong guessed: "The average time difference between the two methods is 0/1 second, you should hear the explosion 0/1 second faster than me, so the propagation speed of the explosion is about 360 meters per second." ”

After Wang Qihong finished speaking, he looked at Wang Haoran for verification, Wang Haoran was noncommittal and said, "You can experiment with it." ”

"Why don't we take another pendulum clock, adjust the time of the two pendulum clocks to the same time, be far apart, make some sounds out, and record the time when we hear the sound, and compare the two times to know the speed of sound propagation?" Yu Yuyao proposed.

"No, we just need to change the cupola to a pure explosion and detonate it far away. We start the clock when we see the explosion and stop when we hear the explosion. Wang Jingxiu said.

"Is that okay? It takes some time for us to hear distant sounds, so it should take some time to see distant objects, right? Wang Qihong asked.

Wang Haoran happily watched them discuss from the sidelines, with a sense of accomplishment. The topics they are talking about now and the opinions they put forward are all their own thoughts, and Wang Haoran has never mentioned them before. If they hadn't opened their horizons and imagination here, could they have thought of this?

However, at this time, he could not continue to be silent, if they discussed the speed of light, Wang Haoran himself could not measure it, so he interjected: "The speed of light is very fast, so fast that we can understand that it is imminent, and it has little impact on your research on the speed of sound propagation. ”

So they measured the speed of sound according to Wang Jingxiu's method and came to the conclusion that it was 338 meters per second, and Wang Haoran also agreed with this inaccurate answer.

A few days later, Wang Haoran gathered everyone again, and now these newcomers have been here for a few months, and their minds have been greatly liberated, and it is time for them to take on the responsibility alone.

"Now that the scope scale and the calculation method used in the sniper rifle have been studied, I will also report this truthfully to Your Majesty, and how Your Majesty will treat you depends on his mood." Wang Haoran said to everyone, "Now I want to adjust the work content for you a little. ”

Everyone is looking forward to their new assignment.

Wang Haoran continued: "At present, I have divided into six fields, the first one is called chemistry, which is a field that you have never been exposed to before, so I will arrange two people to study together, and the candidates are Zizhao and Jinglu. ”

Yu Zizhao became excited, he was going to become a leader in the field of chemistry, he felt good, and asked, "Little master, what does chemistry do?" ”

"To put it simply, it's just to turn a few objects into other objects, a bit like what you studied before, and as for the specifics, I'll get you started first." Wang Haoran said, "The second is physics, which is in charge of Yu Yao, which is to study various natural phenomena to come up with theories, and the experiments you participated in to study free fall belong to this part." ”

"But I don't know how to start?" Although Yu Yuyao was happy that he could stand alone, the physics he said to Wang Haoran was still in the clouds.

"You don't have to worry about that, I'll assign you tasks at first. Your first task is to design a unit of measurement for the magnitude of the force, and to find a standard pattern that is constant and unchanging. For example, we made a gold nugget as a standard for length. ”

"Definitely complete the mission!" Yu Yuyao is much more excited now, this is a famous thing in history!

"The third is mathematics, which has to be the third brother. This is a very important field, and arithmetic is basically used in other fields. ”

"No problem." Wang Jingxiu replied simply.

"The fourth is planting, at present, we only need to concentrate on the study of miscellaneous rice, and Xuan'an is in charge. The fifth is machinery manufacturing, which is in charge of Zhaoyun. Wang Haoran said to Yu Zhaoyun again: "In the future, Chen Jun will design all kinds of components, many of which cannot be made by these devices today, and your task is to solve these problems, improve the equipment, and redesign new processing technology." ”

"Can I make a flying car, then?" Yu Zhaoyun still remembers his dream of flying.

"It's your freedom, but my advice is to let go of your flying dreams and walk the road on the ground first."

"Little Master, are you planning to start making steam power?" Chen Jun heard some signs from Wang Haoran's words.

"Soon, as long as the miscellaneous rice planted next year is okay, we can start developing. Now, you and Chen Jie and Wen Shan can go to the development of rail cars to practice first. ”

"Why do you have to be able to study steam power when you have no problem with mixed rice? It shouldn't be much of a problem for us to start researching now, right? Chen Jie wondered.

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