Daming: The system rejected my request for salted fish

Chapter 900

clap clap clap!

Upon hearing the craftsman's question, Wei Wu immediately raised his hand and applauded him with a smile on his face.

"That's a very good question. Air pressure is the pressure of the atmosphere. Simply put, air has weight."

"Does air have weight?"

After hearing Wei Wu's words, the craftsmen's expressions became even more confused, and then they saw Wei Wu take a deep breath.

"Yes, it's the air you breathe every day. It actually has weight, and we are all weighed down by it."

"I can't explain this in detail right now. I can only give you a standard figure."

As he spoke, Wei Wu turned around, picked up the whiteboard, turned it over, picked up the marker and wrote 1.29kg/m².

"That's the weight of air, 1.29 kilograms per cubic meter, of course, under normal circumstances."

To be honest, after Wei Wu finished speaking, all the craftsmen present became conflicted.

They absolutely believed what Wei Wu said, but at the same time they found it hard to believe. It was such a contradiction.

They understand the units of kilograms and cubic meters, but they don't understand the weight of 1.29 kilograms per cubic meter.

If air has weight, why don't they feel it at all?

Seeing the expressions on the craftsmen's faces, Wei Wu smiled. Knowing that they would find it hard to accept, he thought of a way.

"You don't feel anything because we've adapted to this environment, and there's air in our bodies."

"It's like using two paperweights to apply pressure from both sides of a piece of paper at the same time. It won't have any effect on the paper."

"But if you take away a paperweight, it's like taking the air out of the body, and the effects are immediate."

"Of course, now is not the time to discuss this. We can do an experiment later and you'll understand."

After saying that, Wei Wu turned and looked at Sun Chang.

"Sun Chang, send a message to the blacksmith team. Have them make two sealed hemispheres out of copper, and..."

After Wei Wujiang finished speaking, Sun Chang's eyes immediately lit up and he quickly asked:

"Vice-President, is this for the experiment later?"

"Yes."

Wei Wu nodded in response. Seeing this, Sun Chang immediately arranged for someone to handle this matter.

After Sun Chang had made the arrangements, Wei Wu returned to the previous topic.

"I've already explained the air pressure. You'll understand it after we do the experiment. Next, we'll learn how to create a high-pressure environment."

"Actually, this is very simple, and you've already created it yourself. You might as well think about this question yourself."

With just one simple sentence, the craftsmen immediately fell into deep thought, recalling the things they had participated in.

In the end, it was Sun Chang who reacted the fastest and immediately gave the answer.

"Mr. Vice-President, are you talking about the boiler of the steam engine?"

Wei Wu looked at Sun Chang and nodded with a gratified expression.

"That's right. The higher the temperature in a sealed environment, the greater the internal pressure will be. Of course, this is not the only way to increase the pressure."

"But it's enough for you to just know this knowledge. For now, we don't have the conditions to study this issue too deeply."

"Regarding air pressure, remember this: the higher the pressure, the higher the boiling point of water. Conversely, the lower the pressure, the lower the boiling point of water."

"For example, in the U-Tsang region, due to the high altitude and low air pressure, the boiling point of water is also low, and the temperature is not high enough, so it is difficult to cook food."

"You can experience it yourself if you have the chance. As for the air pressure, we'll talk about it later when we do the experiment!"

After temporarily putting aside the topic of air pressure, Wei Wu pointed at the icicles on the podium that had begun to melt.

"I've already explained superheated water. Now let me explain supercold water. We just mentioned that water below zero degrees will freeze."

"But for water to become solid, in addition to temperature, it also requires an external factor, and that is condensation nuclei!"