The increase in entropy is an unexpected discovery, but it is also a reasonable discovery.

If Fei Cai could easily mobilize a huge force far beyond common sense just by quoting the laws of physics, would this still be a nightmare task?

If Fei Cai's strength is not limited in any way, then he only needs to return to the Central Plains to kill the protagonist Wen Ren after completing the first stage of the task and the restriction of not being able to kill the protagonist is lifted, and there is no need to toss in the Wu clan at all.

But now it seems that such a scenario is clearly impossible. Since this is a farming task, Fei Cai's own strength must have some kind of connection with the development of the Wu Clan.

As for the specific connection, he already has a conjecture, but in order to verify this conjecture, two things must be completed first: first, let Biluo thoroughly understand the law of universal gravitation and Newton's three laws, and second, repair the altar.

And these two points happen to be his current goals.

It's just that it's more urgent than before, and Fei Cai must let Biluo see and experience the law of gravitation and Newton's three laws with his own eyes before his ability is too weak.

"Let's go to that river, the same one that fought with Jinglei Village last time. Fei Cai said.

Although this came very suddenly, Biluo didn't ask much, nodded and said, "Okay! ”

So the two did not go back to the village, but walked directly in the direction of the river, and after about half an hour, they came to the river.

Fei Cai decided to let Biluo really understand Newton's three laws and the law of universal gravitation here.

"If humans were born in a weightless world, perhaps they could easily have discovered the three oracles of Newton, the great witch god. He opened with this sentence.

"What is weightlessness?" asked Biluo curiously.

"That's the time I made you float in mid-air, just without gravity, or gravity. Fei Cai explained.

"Are you saying that the reason why everything falls to the ground is because of a force called gravitational force, not because of the spirit of the earth?" Biluo has learned the concept of "force" since she learned Newton's three laws.

"That's right. Fei Cai said with satisfaction. "But I'll tell you about the oracle of gravity later. Now, let me show you for yourself the three oracles of Newton. ”

Seeing Biluo nodding, Fei Cai silently recited the law of gravitation, raised his right hand, grabbed his five fingers out of thin air, and there was a water sound, and a water balloon as big as a basketball suddenly rose from the river.

He hooked his fingers, and the water balloon slowly came to the two of them, and since it was completely weightless, the surface tension of the water made it take on a perfect spherical shape. The sunlight shines on the surface of the water balloon, reflecting a brilliant light.

"Ah......" Although Fei Cai's ability was already known, this wonderful scene still made Biluo exclaim in a low voice.

"The first oracle: an isolated particle remains stationary or moves in a straight line at a uniform speed. I made the gravitational pull on this water ball zero, and now it is not subjected to any external force, so it is still here. That's understandable, isn't it?" Fei said.

"Hmm. Biluo nodded, her gaze still locked on the wonderful water balloon.

"Now, I'm going to give it an initial velocity. ”

Fei Cai said and pushed gently, his hand did not touch the water balloon, what really acted on the water ball was a very small and extremely uniform thrust, and only in this way would the fragile water ball not fall apart.

After a second, Fei withdrew the thrust, so the balloon stopped accelerating and moved along the river bank at its original speed.

Since it experiences negligible air resistance at low speeds, its motion is very similar to that of a uniform linear motion.

Biluo's eyes widened, and she saw that the water balloon was like a ghost, floating quietly and gently in a straight line.

It's common knowledge that things move when they are pushed, but they stop moving quickly. It's like if you kick a barrel hard, and although it will roll fast at first, it will soon slow down and eventually stop completely.

On their own instincts, people don't think it's because of the friction, they think it's because they don't apply force on the barrel, so it stops.

But the oracle told her that this was not the case, because the first oracle of the Great Witch God said that if an object was not subjected to any external force, it could maintain a uniform linear motion except for being stationary.

She had tried to imagine what it would be like, but no matter how she imagined it, it was not as wonderful as the scene in front of her.

While she was stunned, the water balloon had floated some distance. Biluo hurriedly chased after her, moving with the water balloon, she tried to see if the water ball had slowed down, but ...... At least no change is visible to the naked eye.

At this point, the water polo was almost out of Fei Cai's ability control range. So he also hurried to catch up, and said to Biluo, who had a stunned expression, "Let's follow it for a while, okay?"

The shrine maiden girl nodded woodenly.

So, Fei Cai and Biluo walked slowly along the river bank as if they were walking with the water polo. On the way, in order to counteract the cumulative effect of air resistance, Fei Cai secretly exerted a countervailing force on the water balloon. It sounds a bit like cheating, but it's actually the real net force of the external force is zero.

Biluo was silent along the way, but the expression on her face kept changing. Before they knew it, the two had walked two miles, and the water balloon beside them was still floating at the same speed as it was at its beginning.

"Isolated particles remain stationary or move in a straight line at a uniform speed. ”

Fei Cai's ears suddenly sounded Biluo's voice. He turned his head and saw that instead of looking at the water balloon, she was staring at the far horizon, her eyes ethereal.

"Isolated particles remain stationary or move in a straight line at a uniform speed. ”

Biluo repeated it again.

Fei Cai suddenly understood, I am afraid that in the heart of this witch, the water ball in front of her has moved to the end of the world, where it still maintains a uniform linear motion.

The never-ending universe in classical physics, the world where time and space are uniform everywhere, is taking shape little by little in Biluo's heart.

"Isolated particles remain stationary or move in a straight line at a uniform speed. ”

When she said this for the third time, the space around her suddenly shook. Affected by the spatial shock, the fragile water ball was finally dispersed, and it instantly turned into countless water droplets, spreading in all directions.

The witch looked at these droplets, they had already flown out of Fei Cai's control, but they still maintained their initial speed and direction, and kept going, as if they were about to fly to the end of time and space.

They are neither affected by gravity nor air resistance. Fei only knew that this was because Biluo had eliminated all the external forces they had been subjected to.

Between heaven and earth, there was a low hum.

Biluo finally turned around and smiled at Fei Cai: "Lord Divine Envoy, I think I have already understood the first oracle of the Great Witch God. ”