Catch fish.
This is the so-called twenty-four or thirty-six filial piety.
If you have read Citizens of the Country (83rd edition), you will never forget to cry on the penultimate page of the chapter on filial piety.
Bamboo is classified as "foolish filial piety". Of course, most people, including me, are very interested in the topic of civil rights.
Disdain, if you can repay your mother's kindness and make her recover, crying out of the rectum or frostbite is worth it. Why be stupid?
what's up The so-called "save your mother in the morning, you can die at night", but we have developed a scientific mind. After careful consideration, we finally
Yu explained the so-called "stupidity" of "seeking carp on the ice" by professors at the National Compilation Museum.
First of all, we attach great importance to facts. A family that will end up like this must be neither rich nor poor.
Ordinary people, mother and son live together, and the labor force may not be able to eat and wear warm clothes. This man must be a thin child.
Understand the relationship again, you should not be difficult to imagine the low temperature at that time: after all, people can take baskets at will.
When you run to the middle of the lake, the ice on the lake must be thick enough, so the temperature at that time must be below MINUS ten degrees.
.
Then let's make a conservative guess. At that time, the ice was only 15 cm thick and the temperature was MINUS 10 degrees Celsius. A man who was killed by someone else
As an idiot, the young man ran to the middle of the lake, took off his coat and lay on the frozen ice. Let's assume that he is
In order not to freeze myself to death and try to avoid unnecessary direct contact with ice, I only let my chest stick to the lake.
On (of course, I won't do this action), and just mentioned that he is not very strong, so he only melted a straight board.
A circle with a diameter of 30 cm. Then it must be accurate. In this regard, Mr. Ren Hongjuan attaches great importance to it.
Tell people the time and tell the seconds (whose watch is really accurate? )。 Melting ice
The bottom area is a circle with a radius of15cm (it should not be a circle, but it is quite close, not to mention irregular).
The area needs to be integrated, which is really troublesome), the height15cm, and the total volume10603cm3.
, multiplied by the specific gravity of 0.92g/cm3, is 9755g ice, specific heat of 0.55 cal/g C, let it rise.
10 degree needs 5365 1 calorie to reach the melting point; In addition, the melting heat of ice is 80 calories/g, which should be melted from ice.
It takes 780372 calories to make water. These two temperatures add up to 834,023 calories, which is about 834 calories.
Then, the health education class tells us that a person's chest accounts for about 9% of the body surface area. this
These data were originally used to calculate the burn area, but they are also very useful here. The man was exposed to cold air.
You see, in addition to 9% being stuck by ice, 9 1% of the skin is also emitting heat. because
The air is much lower than the body temperature, so it stands to reason that the heat dissipation rate of the whole body should be similar; Give him what he needs to breathe.
Energy neglect, the energy needed to maintain that strange posture with only the chest on the ground is also ignored, thinking and others.
All the energy needed for visceral activities is ignored ... he will still melt ice and emit 834/9*9 1.
The heat in the air, so that the whole process down, he lost 9267 calories, enough.
Three or four times as much as a person needs every day.
To be thorough, we know that Xiang has no money and almost no food at home, because his mother is ill in the cold winter, and
In ancient times, people didn't go to school to study health education, so it was absolutely impossible to have a rich and balanced diet as mentioned in textbooks.
9267 calories may be eaten by mother and son for four or five days; Besides, after that, my hand
Freezing and catching fish must get twice the result with half the effort. I don't know how much energy it takes to achieve it. If for the sake of
Buying a fish to go home is really better than eating for two people for half a month at a time. So he
Not only is it stupid to have no economic concept, but it is also stupid to have no environmental protection concept.
To put it more thoroughly, one card is equal to 4. 187 joules, so 9267 card is almost 38800929 joules.
This kind of energy can lift a 50-kilogram thing to 79 kilometers in one breath, or make a 5-ton car run.
At the speed of 448 kilometers per hour ... with such abnormal power, the ice of the whole lake can be smashed into pieces casually.
Why freeze yourself to death? This is stupid filial piety.