Why are leather shoes getting brighter and brighter?
On Sunday, I couldn't help sighing when I saw my father's dusty leather shoes. Well, it seems that I should be a coolie again. I picked up my father's dusty leather shoes and polished them carefully, reappearing my youth. Why? I don't doubt it.
So I found a new pair of shoes to compare with the old ones. I first touched the uppers of two pairs of leather shoes and found that the surface of the new shoes was smoother than the old ones. After the old leather shoes are painted with shoe polish, careful observation shows that although they are much brighter, they are still not as good as the new ones. Is there a relationship between the brightness and smoothness of leather shoes?
I went to get a pair of old leather shoes, which looked uneven under a magnifying glass. Then I applied shoe polish to the rough areas 1 and 2 of the leather shoes, and wiped them carefully. The area 2 was not applied as a blank control. I found that the surface of 1 area was much smoother after wiping, and it was brighter than that of area 2 in the sun. Why is there such a big difference between them?
So I went to ask my father that the surface of leather shoes is not absolutely smooth. If they are old leather shoes, they are even more uneven, so that they can't reflect light in a certain direction and look dim. And some small particles in shoe polish just fill the pits of leather shoes. If cloth shoe polish is used to make it more uniform, the surface of leather shoes will be smoother and more reflective.
Through the experiment, I finally know the secret of shoes getting brighter and brighter.
ball chuck
Do you have any sweaters at home? I think you must promise. Every household has sweaters now, but have you ever observed sweaters? If you look carefully, you will find that there are many small balls on the sweater, which are made up of the hairs on the sweater. This will not only hinder the appearance, but also make you feel very uncomfortable. If it is not handled properly, it will damage the whole sweater, which is even worse. At this time, it's the hair ball trimmer's turn to play. I saw it running at full power, blowing hairballs. I saw that all the hairballs were gone and the sweater was clean. Just when I was surprised by this hairball trimmer, a cloud of doubt suddenly rose. How to trim the fluff trimmer?
While I was wondering, my father spoke and asked me to find the answer myself.
I took out the instructions, studied them carefully and began to dismantle the trimmer. I turned off the switch of the repairer first, then unscrewed and pulled out the outermost outer knife net, and then took out the main round knife. The blade was extremely sharp, and then I saw the wind blade with four boards erected. When the switch is turned on, it will turn quickly. There is a huge gap at the bottom of the fan blade, and the hair ball falls from this gap and falls into the storage bin, where it is kept.
It turns out that this trimmer uses a motor to drive the blade to rotate, and the blade is connected with a round knife. When the blade rotates at high speed, so does the circular knife. The outer knife net separates the clothes from the round knife to prevent direct contact with the clothes. There are many small holes in the outer cutter net. When the hair ball contacts the clothes, the hair ball extends into the outer knife net and is directly cut by the circular knife. The cut hair ball fell from the side of the round knife to the fan blade below. In the case of high-speed rotation, the four vertical plates on the blade "hit" the hair balls into the storage bin like playing badminton. During the experiment, I found a problem: as soon as I unscrewed the outer knife net, the maintainer stopped rotating. Is there no electricity? Then why did you turn so fast just now? After many experiments, I found that there is a button next to the fan blade, just like the lamp on the refrigerator, there is a button. This button will be pressed after the outer cutter net is tightened. When pressed to the bottom, the protection function is turned off and the trimmer works normally.
It turns out that a hairball trimmer still has so much knowledge!
Why do people conduct electricity?
It's finally the weekend, so I can watch TV. I'm so happy. I just listened to a whoosh and lay in bed watching TV.
The TV channel flickered on and off, and then my mother just came in to clean the room. I told my mother about this situation. My mother said helplessly, "I don't know what to do." Get out of the way I want to clean the TV. " "All right, all right." I said with ecstasy. "What's ready?" My mother looked at me doubtfully. "What else can be good? Television is certainly good. " Mom said, "Where?" "Well, just fine. Why? " "Good again." For this problem, I summed it up: as soon as mom touches the antenna, the TV will be fine; As soon as I let go, the TV broke down again
A question popped up in my little head: Why does the human body conduct electricity? After looking up a lot of information on the internet, I realized that there is electricity in the human body, so there are electrolytes such as sodium, potassium and calcium, and the electrolytes are in human body fluids. The human body contains a lot of blood, lymph and cerebrospinal fluid, mainly composed of water. Every cell in the human body is filled with water, in which various electrolytes are dissolved. These all constitute human body fluids. Body fluids exist in human body, accounting for a very large proportion, accounting for 70% of human body weight. When electrolyte is dissolved in human body fluids, charged ions are formed. Under the action of external electric field, these ions move directionally in body fluid to form current, and the human body also has conductivity and becomes a conductor.
The secret of iron sheet
We learned Tin Pots and Pots, knowing that tin pots rot easily in the soil, and a little question mark popped up in our mind: So where does iron rust fastest? To this end, I made a small experiment after repeated thinking and research.
I prepared three small pieces of iron in advance. One is placed in a place with low temperature-refrigerator; One is buried in the soil; The last one was put in salt water. Let's see which will make the tin rust faster. At the end of the day. Before I came to the refrigerator, I carefully took out the iron sheet and observed it carefully. The iron sheet hasn't changed at all. I then went to the flowerpot and dug out the iron pieces hidden in the soil, and the result was still the same. Finally, I came to the cup and took out the iron piece soaked in water, but there was no change at all. This annoys me: "Will it take a long time to have an effect?" I left the experimental site with questions. A few days later, I went there again and was surprised to find that the iron sheet in the soil was a little rusty, while the iron sheet in the salt water had rusted. What the hell is going on here? With this question, I turned on the computer and realized that it was the reaction of the primary battery, and the ions were conductive. Because two metals usually have different activities. Take iron and copper for example. Because there is moisture in the air, water usually contains acidic gases, such as carbon dioxide. When the iron sheet encounters acid, it loses electrons and becomes iron ions. The electrons move to copper through the metal, and then are reduced to hydrogen to form primary electrons. This reaction is called hydrogen evolution reaction. This corrosion of iron is called electrochemical corrosion, and the electrochemical corrosion rate is faster than that of general oxygen reduction corrosion.
Experiments and data prove that salt water will make iron rust faster!
Why can rice stick to things?
Everyone should know that rice can paste things! Because at home, I often see grandparents' stickers, which are broken. But it will naturally fall off after a long time, so it is also harmful to stick things with rice. Today we are going to learn why rice sticks to things. Do a little experiment ~
This Saturday morning, I took out the small white rice left in the refrigerator and the shredded paper that had been in the locker for many years, and the experiment began. First grind the rice into very fine grains of rice, and then put them on the broken white paper bit by bit. Soon a broken white line will be restored, but only a trace will be left. Time flies. Finally, after fifteen minutes of hard work, I put a piece of broken white paper on a brand-new edge. Don't know much about mystery!
As far as I know, because rice contains starch, when cooked into rice, starch will gelatinize and become sticky when it meets water. Tip: However, starch contains sugar, which will lose its viscosity if it takes too long.
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