Song Qingshu was shocked: "What do I owe you?"
The yellow-robed woman opened her mouth but didn't say anything. Instead, her face blushed slightly. After a long time, she whispered: "You also told me how you were able to call the wind and summon the rain last night."
Song Qingshu remembered that in order to get the answer last night, she had even kissed him. He covered the place where she had kissed him last night and couldn't help giggling.
"Don't laugh!" The yellow-robed woman couldn't help feeling annoyed.
"Okay, okay, okay, I won't laugh, I won't laugh." Song Qingshu saw that the woman in front of him was about to transform into an angry female leopard and hurriedly said, "Since I have received the reward, I naturally won't go back on my word."
The yellow-robed woman's expression eased slightly, but when she thought of the reward he spoke of, she felt uncomfortable.
Song Qingshu cleared his throat and began to explain: "Do you know the principle of rain?"
The yellow-robed woman frowned slightly and shook her head. Although she knew that thunder and lightning were only myths and legends, she really didn't know how it would rain.
Song Qingshu explained with a smile: "When the sun shines on the earth, water vapor rises from the surface of the ocean and lake and becomes part of the air. When it encounters cold air in the sky, it condenses into small water droplets. These small water droplets are very small, so small that they can't be seen with the naked eye. They are small and light. They are carried in the air by the rising air currents and gather together to form clouds … "
"Clouds are formed by water vapor?" The yellow-robed woman couldn't help but ask. She was confused by the rising air currents. It should be known that the people of this world always imagined clouds as a mysterious thing and often associated them with all kinds of myths and legends. How could they know that clouds were actually ordinary water vapor?
"Of course, I have been to the clouds." Song Qingshu couldn't help but think of the scene of him and Dongfang Muxue passing through the clouds at Black Wood Cliff. A trace of tenderness appeared on his face.
The yellow-robed woman subconsciously felt that he was bragging. After all, according to common sense, only immortals could ride the clouds. But when she thought of the scene of him walking step by step into the sky last night, she couldn't help but sigh: "That's right, with your qinggong yesterday, it wasn't difficult to go up to the clouds."
Imagining the scene described by the other party, she suddenly frowned and said, "According to what you said, the clouds are all water droplets, so why don't the water droplets fall?"
"Didn't I just say that those water droplets are very small, so small that you can't even see them?" Song Qingshu explained, "The raindrops that you usually see are more than a million times larger than those water droplets."
"A million times?" The yellow-robed woman's expression changed. She couldn't imagine what a million times was.
Song Qingshu explained to her, "Those small water droplets are also called cloud droplets. They mainly rely on absorbing the water vapor around the cloud to condense and condense themselves … Uh, what is condensing? You can think of it as strengthening yourself … If the water vapor in the cloud can be continuously supplied and replenished, the surface of the cloud droplet will always be in a state of supersaturation. Then, this condensation process will continue and the cloud droplet will continue to grow. "
"When the cloud droplet grows to a certain extent, because the volume and weight of the large cloud droplet will continue to increase, they will not only be able to catch up with the slower small cloud droplets during the process of falling, but they will also 'swallow' more small cloud droplets to strengthen themselves. When the large cloud droplet grows larger and larger, it will finally become so large that the air can no longer hold it, and it will fall straight from the cloud to the ground. It will become the common rain that people see, and eventually become raindrops. "
The yellow-robed woman nodded, not fully understanding. Fortunately, she was well-read and smart. Although there were still many details that she didn't understand, she understood the general principle.
"But …" The yellow-robed woman suddenly thought of something and looked at Song Qingshu with a burning gaze. "According to what you said, it will only rain when the cloud droplets are large enough, but how did you so coincidentally control the time of the rain yesterday?"
"This is all thanks to your help." Song Qingshu smiled.
"Me?" The yellow-robed woman's pretty face blushed. "How did I help you?" She thought to herself, 'I don't even know the principle of rain, how can I help you?'
"Did you forget the bag of things that you helped me find yesterday?" Song Qingshu's eyes were full of smiles.
"That bag of salt?" The yellow-robed woman's moist red lips were wide open. "That bag of salt is used for rain?" When she heard his request yesterday, she was confused, but she still found it for him out of trust. Later, after experiencing the shock of him ascending to the sky and summoning the wind and rain, this small matter was quickly forgotten. Who would have thought that it would be related to rain?
"Otherwise, should I bring it to eat?" Song Qingshu smiled and continued to explain, "Just now I already explained how rain is formed, but there is still a key question that I haven't said. That is, how does the water vapor form small water droplets in the first place?"
"How?" The yellow-robed woman was already confused at this time, and asked completely out of conditioned reflex.
Song Qingshu answered, "Water vapor must accumulate around small particles such as dust to form water droplets or ice crystals. These particles are very small and can't be seen with the naked eye, but without these particles, even if there is enough water vapor in the air, it is impossible to form a drop of rain. "
"So you used salt to replace those particles?" The yellow-robed woman was exceptionally intelligent and quickly deduced other things from one example.
"That's right." Song Qingshu nodded. "When I reached above the clouds, I used my power to spread the fine salt evenly. The water vapor in the clouds condensed, and the speed of rain was greatly reduced …"
As Song Qingshu spoke, he suddenly realized that the yellow-robed woman was staring at him blankly, and couldn't help but laugh. "Is there a flower on my face?"
The yellow-robed woman's face reddened, and she hurriedly shook her head. She whispered, "I didn't understand what it meant to be a pedant before, but today I finally see it. Not only are your martial arts unparalleled, you are actually so knowledgeable …"
"These skills are not worth mentioning." Song Qingshu's expression became solemn. "In fact, my greatest strength is that I am handsome and elegant."
The yellow-robed woman originally looked at him with a face of worship, thinking that he would say something that would shock the ancients and dazzle the contemporaries. She didn't expect such an answer. She couldn't help but blush and spit, "You are always so frivolous."
Song Qingshu spread out his hands. "Looking at your face just now, if I continue to be serious, you will worship me as your master. I don't want you to call me master."
"Then what do you want me to call you?" The yellow-robed woman opened her mouth, but in the end, she didn't say this out loud. There was a faint smile on her face. "Actually, I really want to invite you to the academy to teach those students."
"Please don't!" Song Qingshu shook his head like a rattle drum. "Your academy studies the books of sages and sages. They are used to take the imperial examinations and rise to the sky in one step. They won't be willing to learn this knowledge of physics even if you give it to them for free."
Thinking of the group of fanatical bookworms in the academy, the yellow-robed woman nodded subconsciously. "That's right."
"What's more …" Song QingShu changed the topic and looked at the yellow-robed woman with a smile. "Those students in the academy are basically your fanatical fans. If they knew about our relationship, wouldn't I be ganged up on?"
"Bah!" The yellow-robed woman's face reddened. She couldn't help but spit lightly. "What relationship can I have with you?"
"The relationship of sharing a bed, the relationship of kissing …" Seeing that the yellow-shirted woman's face was getting darker and darker, he hurriedly changed the topic, "Ahem, I have already told you the secret of the rain, shouldn't you return the favor and help me?"
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The "Shenzu Scripture" that You Tanzhi practiced in the Demi-Gods and Semi-Devils came from the country of Magadha. That was why the monk posted a peerlessly beautiful Princess Magadha on the public account today.
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