Chapter 395 Digging a Hole
The hustle and bustle of the outside world is thousands of miles away, so Bifang, who is at the top of the world, naturally has no way of knowing.
In the enclosed and narrow space, he was holding on to the snow wall to measure the size of the space, while at the same time teaching the audience some ways to save themselves after encountering an avalanche.
"The release process of an avalanche usually goes through three stages: First, under certain snow conditions, external factors cause part of the snow layer to shear, break, and dislocate, leaving small scars on the fragile snow."
"Then, this small scar will 'infect' the surrounding snow layer, and the scar will gradually expand, causing the surrounding snow layer to become dislocated."
"Finally, the snow on the hillside continued to collapse like dominoes, forming a scar on the calm hillside. The scar eventually fell off and an avalanche poured down. This avalanche can be avoided by observing it in advance."
"Of course, there are also types that come without warning, such as slab avalanches, which are characterized by linear cracks in the snow at the avalanche origin area. It looks like a whole slab of snow has fallen off. The cracks can sometimes be hundreds of meters long. Even if the thickness of the snow slab is very thin, the total volume of snow that is moving can still be staggering."
[What kind of avalanche did Lao Fang encounter? ]
"Although I can't see the bullet screen now, I know you will definitely ask me what kind of avalanche I encountered this time, but in fact, I don't know. It was four in the morning and it was too dark. I couldn't see it clearly. If the satellite had taken a picture, I should be able to see it."
Bifang shook his head. He always felt that this avalanche might not be accidental, otherwise why was he so unlucky this time?
"If an avalanche is in front of you, take a deep breath and hold it. If there are trees, rocks or solid objects around you, hold on tightly because the impact airflow of the avalanche is very strong. Try not to be swept away by the snow flow."
"If an avalanche happens right under your feet, try to jump up and run across the fault line. However, avalanches usually happen very quickly, and there is no time to react like this. If you are unfortunately caught in a snow flow, you must swim upstream with your limbs upwards, and try to stay on the surface of the snow flow as much as possible. The shallower you are buried, the greater your chance of survival."
"When you are buried by the snow of an avalanche and cannot escape, you must reduce your activities and slow down your breathing to save energy. Some emergency breathing devices can help people in distress hold on for dozens of minutes."
"Of course, you can also try to save yourself by shaking your body to expand the space around you little by little, freeing up your hands to swim up. However, I don't recommend doing this without certain skills and judgment, because the process of expanding the space is very physically demanding, which means that oxygen consumption will increase and the risk of suffocation will increase. Normal people cannot judge how deep they are buried. The deeper they are, the greater the danger."
[Speaking of which, although the space has become larger now, is it okay for Fang Shen to keep talking? Will it increase the consumption of oxygen? ]
[Yes, although everyone else is using oxygen cylinders, this small space won't last long, right?]
" After the avalanche, we are so lucky. If you encounter this situation, there is no need to go out. You can stay here for a day. As for the oxygen problem, you don't have to worry about it. How long can a person breathe with only one cubic meter of air?"
Bifang stretched out a palm, and under the illumination of the headlights, the audience could clearly see the five fingers.
Although Bifang has to pretend not to see the barrage, he can definitely answer questions with more context to ensure audience interactivity.
Five fingers, that’s... five minutes?
The audience thought about it and roughly guessed the time: five minutes for one cubic meter, which is about the right number.
"Five hours."
puff!
Five hours?
Are you kidding?
【Five hours, crazy, right?】
[Is this the turtle breathing technique? 】
[I have read a novel written by a failed author named Shell Ant. I heard that the turtle breathing technique is because turtles can exchange gases through organs near their glans in water. I don’t know if it’s true or not.]
[If the person who said this was not Fang Shen, it would be impossible for me to do this]
In any case, it is hard to believe that one cubic meter of air can be breathed for five hours.
"I know some of you will not be able to do it. In fact, you will know if you do some simple addition and subtraction. I will give you a question." Bifang smiled, then pondered for a moment, and spoke after a while.
"It is known that in normal air at one atmospheric pressure, an average adult male lying still inhales about 0.5 cubic meters of air per hour, with an oxygen concentration of 21%. He breathes 0.5 cubic meters of air per hour, consumes 5% of oxygen, and exhales about 16% oxygen and 4% carbon dioxide. But when the oxygen concentration drops to 6% and the carbon dioxide concentration reaches 8%, a person's heart will stop beating within a few minutes. Now a man is trapped with only one cubic meter of air. How long can he hold out until rescued?"
It's outrageous!
[I've graduated from college, but I still can't get rid of math problems? ]
【Algebraist! 】
[It turns out that math is not just useful for buying groceries, it is really useful, woo woo woo. ]
【Forget it, forget it】
[Forget it]
"Air has two functions for human breathing. One is to provide sufficient oxygen for inhalation, about half a cubic meter per hour. On the other hand, air is responsible for the diffusion of carbon dioxide exhaled by people. It takes about 30 cubic meters per hour to complete this task, which is the standard for healthy living."
"There have been cases of people dying suddenly while running while wearing masks. The root cause is that the carbon dioxide in the exhaled air does not have time to diffuse and is inhaled back again."
"I don't know if anyone has figured it out yet, but I can tell you right now that the answer is about 5.2 hours. Of course, this is a rough estimate and the actual situation is different. Because the oxygen content in the air is low after breathing for a short period of time, people will increase their breathing depth and even yawn. In addition, being in a small, enclosed space will increase the frequency of breathing due to stress. 5.2 hours is an ideal state. Generally speaking, an average person will die easily after three hours."
Bifang raised his head and looked around, fully revealing the enclosed space.
"There are at least ten cubic meters here, so there's no need to worry about oxygen. It's okay to talk, but we'd better get out as soon as possible because the stability here is questionable and it may collapse. We can't stay here forever. Digging holes randomly may affect the stable structure of the entire space, so we should get out through the hole we dug when we came in."
Bifang looked at the cave entrance through which he and Tenzin had come in, and began to dig out the snow in the cave, while at the same time kicking Yao Jun who had collapsed on the ground.
"What are you standing there for? Get up and work. Do you still want to eat?"
Yao Jun was stunned for a moment: "Eat? Paste again? I'm about to vomit."
"Unfortunately I didn't bring many energy bars, so you can't even eat porridge here. You can only eat energy gels."
"yue!"
Thinking of the energy gel that tasted like snot, Yao Jun almost retched and could only get up from the ground reluctantly.
"Damn it, I'm such a hard worker."
