How to determine the amount of depression of the steel wire projection electrode on the steel wire?

The superiority of stone low carbon steel wire mesh.

There are issues that families are concerned about. Most people choose to lay heat, and it is important to use mild steel wire mesh in floor heating. It can be seen that the main function of mild steel wire mesh is for heating.

The material it uses is very simple, as long as it is placed on the floor of the home, it will make people feel warm when heated. Because the cost of mild steel wire mesh is not very high, as long as the floor under the floor can make people feel warm, it is better than the previous heating, which can save money. At present, the low-carbon steel wire mesh has been plasticized, and the performance is relatively stable.

Its advantage is that it can greatly increase the bearing experience of masonry columns, and the reinforcement effect is reliable, and it is suitable for the reinforcement of masonry structures under high stress and high strain conditions. The country's economic construction has entered a new stage, and the demand for low-carbon steel wire mesh for infrastructure construction such as energy, transportation, water conservancy, housing and municipal engineering will surely increase exponentially. Its market application prospect is very broad.

Low-carbon steel wire mesh is suitable for factory and large-scale production, and is an emerging industry with high efficiency, environmental protection requirements, and adaptation to the industrialization development trend of the construction industry. The following is the method of using low-carbon steel wire mesh reinforcement for building walls, and the external reinforcement method of low-carbon steel wire mesh, which belongs to the traditional reinforcement method, is a kind of reinforcement method that uses adhesive to adhere the steel plate to the cracks in the wall. It can greatly reduce the man-hours of rebar installation, which is 50-70 less man-hours than that of the lashing net.

With a dense steel bar spacing, the longitudinal reinforcement and the transverse reinforcement of the welded mesh form a network structure to form a network structure that plays the role of bonding and anchoring, which is conducive to preventing the occurrence and development of concrete cracks.

A bump is usually punched out on one of the sheets. It is suitable for high-volume production occasions.

Generally, the greater the cylinder pressure, the finer the steel wire, and the greater the amount of depression.

Some of the meanings in chemistry are very excessive, and some of his expressions are different now.

I'm a 09 candidate, I just went to college this year, I'm still good at physics, as for how to learn physics? It's deep! Let me give you a few of my own opinions:

Physics and mathematics are relatively related, not good at learning physics is not necessarily bad at learning mathematics, but learning good mathematics is useful for learning physics, there is one in our class, learning physics is not very good, but he can win the first prize in the provincial mathematics competition. But those in our class are good at physics, and basically they are good at math.

Women's physics may be weaker, but physics is not good because you don't understand enough as you said, sometimes I keep thinking about a problem when I can't figure it out, because I have a certain confidence in myself, so I'd rather think about it myself than ask the teacher, ((Really, it's hard to figure it out the first time, but you can figure it out if you think about it a few more times every once in a while, the point!!) Sometimes the answer will come out like a spark, and the idea will become very clear, you try, not to think of it at the first time, but to think of it yourself at the moment or moment. If you can think of a little bit for yourself, then you will come to a lot of conclusions in other chapters of physics, and problems that have been puzzled for a long time will sometimes be solved, so have a little confidence in yourself and believe that you can solve it.

I don't know if you have deduced the formulas in physics yourself, except for those in the cutting-edge science that only need to be memorized, (I have derived them myself, focus)), sometimes even forget some derivation formulas during the exam, but I can introduce them myself, of course, it is best to remember. Save time.

Does physics require rote memorization of a whole bunch of formulas? The answer is no, you only need to memorize a few basic formulas, and then deduce them yourself, I believe it will be of great help to your own memory. It will bring a qualitative leap in your understanding.

Remember, be confident and understand the knowledge, so that you may not be able to win a prize in the competition, but it is enough to face the general exam.

As for chemistry, I think chemistry is easier to do than physics, and I have always thought that chemistry is very simple, isn't it just to memorize the states and reaction equations of several chemical substances, and there is also the conservation of electrons and the periodic table, which are very simple.

Don't put too much pressure on yourself, just like studying physics, seek understanding, although chemistry is simpler, it also needs to be understood.

Long live understanding.

Learning physics is very process-oriented, a process of cognition, understanding, and application.

1.Cognition: Use the things or phenomena around you or even some examples narrated by the teacher to help yourself fully understand it and become interested in it.

2.Comprehension: Use understanding to memorize formulas, theorems, experiments, etc. It can be understood and memorized in clever ways such as visual thinking. For example, what is a vacuum can be understood in this way: a vacuum is really empty, there is nothing.

3.Application: One is to cope with the exam, and the other is to explain some physical phenomena around you.

So, when studying, first of all, don't be afraid, because your previous experience of not learning well may suggest something to you, which may lead to a vicious cycle for you. Try to tell yourself, "I can do it!! In fact, psychological suggestion is very useful!

However, in order to increase your confidence, it is best to do a good job of pre-study and be aware of it.

Secondly, you should follow the teacher's train of thought in class, take some notes appropriately, and write down some knowledge points that are not clearly stated in the book or even omitted and are easy to make mistakes. Take time out of class to practice more, don't prevaricate for any reason, thus giving up the best time to practice, which can only lead to tragedy in the end.

Last but not least, you must make sure to make a timely summary. For example, the paper of the last exam has been sent down, and although it has been carefully corrected, you still have to think about why it was wrong. How is the correct answer calculated?

Will it be wrong if I get it again next time? Wait a minute.

I think that through these study methods, I will definitely be able to learn physics well.

The beginning of compulsory 2 is more difficult, momentum and energy are often combined with the test, don't worry, the next few chapters will be simple, don't be discouraged, do more questions, accumulate more, think, don't dream. It's good to calm down and learn by yourself.

Physics is sometimes abstract, but it doesn't make you think about that.

How is this phenomenon completed, if you want to learn physics well, you have to know the formula, you don't need to use the formula to solve the problem, right? Once you have mastered the formula, you can do the problem. Do the simple ones first, don't think that you won't do the simple questions if you don't take the exam, you just start learning, you have to learn to use the formulas, and you feel that the formulas are almost the same, so start doing the elevation questions.

In fact, the so-called sea of questions tactics does not mean that you can get points by doing questions, doing questions is to strengthen your thinking, this type of question is too much, the next time you encounter this type of question, you will immediately think of the idea of doing this type of question, what you want to learn is to exercise the ability to guide thinking, hehe, in general, it is to do the problem, if you really want to learn well, don't be boring, when you like physics, in fact, doing the problem is a very enjoyable thing, hehe. As for chemistry, it is not a brain-using discipline at all, you memorize the physical properties of each substance, the chemical properties of each substance, and the chemical equations, and the solution is very simple, of course, it is indispensable to do the problem. My sister is a bad science, and when I tutored her, I found that she didn't memorize anything, how do you think this can be learned?

There is also a way to memorize, not to tell you to memorize, but to understand, understand the back, there was 1 time when I memorized the periodic law of the elements when the knowledge was messed up, after asking the teacher, the teacher told me about the substance, and now when I mention this knowledge point, I will immediately think of these substances, so I remember the knowledge point is still very good, hehe. Take your time and don't give up

Not to mention the fake big emptiness, I'm a sophomore in high school, and physical chemistry has not struggled much so far. Let's talk about chemistry first, and in general, there are two parts, organic and inorganic. Inorganic need to remember more, of course, do not remember alone, remember the knowledge points like the word "well", the intersection of each stroke is like a single substance (knowledge point), horizontal and vertical strokes are like their knowledge points, remember the nature of the common (characteristics), there are individual special cases of special notes.

Then there is physics, physics gives me the feeling of being like a string of sugar gourds, each knowledge point is like the hawthorn, independent of each other, the appearance is like the rock sugar, there is a connection on the surface, and there is a stick in the middle, which is the internal connection, usually the knowledge points have to be digested to see the stick, that is, the internal connection. As for "hawthorn", its core is the physical formula, and the physical formula must be memorized (rote memorization, don't listen to the teacher's so-called "understanding to remember")! With the formula as the core, the outer envelope is the explanation of the formula, that is, the definition we see, of course, these are to be understood (just understanding is enough, no need to memorize deliberately).

The last point, in fact, is also an important way to learn, be cheeky, and ask the teacher if you don't know what to do after class. At first, I felt uncomfortable going to the office, but after going there more times, I got used to it, and I had to learn to "rob" the teacher.

Chemistry requires understanding and memorization, with a bias towards memorization.

Physics requires understanding, and memory is only a minority.

If you feel that these two subjects are very important and you are not very good at them, you should spend more time on these two subjects than other subjects.

Nineng memorize is familiar with it, it requires the memorized memorization (if you memorize it soon and forget it, then you have to put in several times more effort than others) in a semester to review often, to the big review after the subject is completed, you will feel that this has improved. During this period, I had to study wholeheartedly, I didn't learn well because I didn't remember it well, I was lazy, it's not that I couldn't remember it, I didn't want to memorize, you have to control yourself and study. Memory must be this to control yourself, learning first.

I regret my laziness at the beginning, hey, you have to work hard.

The main thing is to memorize the chemical reaction equation! As well as the conditions required for the reaction, it is also necessary to remember the color of some substances, as well as the substances that are difficult to precipitate!

Interest is the best teacher, start with common sense, go to the Internet or bookstore to find some popular science books, and establish concepts is the most important.

Do more questions, accumulate more, think, don't dream, in addition, it is especially important to listen to lectures, take notes.

Go to the teacher's office often.

Questions are often received by teachers.

Edification of chemical or physical ideas.

No problem for sure.

Ask often, discuss with your teacher often.

I'm a sophomore in high school.

Learn math well.

Don't be stressed.

It's okay to have a normal intellect and learn anything.

As long as you work hard.

Each carbon atom has four lone pairs of electrons.

Each nitrogen atom has three lone pairs and one pair of electrons.

Each hydrogen atom has one lone pair of electrons.

In other words, in general, the nitrogen atom should be able to form three single bonds, the carbon atom should form four single bonds, and the hydrogen atom should form one single bond.

The configuration of the nitrogen atom in the question is that there is a carbon atom in the middle of every two nitrogen atoms, which means that there are a total of 6 carbon atoms, and each nitrogen atom can form a single bond with each of the 3 carbon atoms, so the nitrogen atom has no free orbital and forms a single bond with the hydrogen atom, so the lone pairs of the hydrogen atom are all connected with the lone pairs of the carbon atom, and a carbon atom has two lone pairs of electrons connected with the nitrogen atom, so there are two lone pairs left that can form two single bonds with the lone pairs of the hydrogen atom. That is, the number of hydrogen atoms is twice as many as the number of carbon atoms.

So the chemical formula is C6H12N4

n is connected with 3 bonds, the figure is full, not connected to h, a total of 4 nn has a c, a total of 6 n-n, so there are 6 c, no c c, c is connected with 4 bonds, two of them are n, so the other two bonds are connected to h, a total of 6 2 = 12 h

Synthesis C6H12N4

Copper oxide reacts with hydrogen ions to form copper ions and water.

The reaction of iron and hydrogen ions to form ferrous ions and hydrogen gas is a redox reaction.

Reducibility: Iron is greater than copper (elemental).

I don't know why sulfuric acid reacts with copper oxide instead of iron first, but sulfuric acid does not react with copper but with copper oxide, if it is copper and iron, then of course iron reacts first, but here is copper oxide and iron, copper here is not copper element, it is copper ion, copper oxide is an alkaline oxide, which can react with sulfuric acid to form water and salt.

The metal activity of copper is higher than that of iron, and under the same conditions, copper reacts preferentially!

Who told you you only react if you ignite? Ignition is a violent oxidation, is burning, but at room temperature the magnesium strip will be rapidly oxidized, the surface of the formation of an oxide film, we do the magnesium strip combustion experiment to use sandpaper to polish this is the reason.

Magnesium can have a chemical reaction with water, but because the surface of magnesium often forms a protective film, so in the reaction between magnesium and water, the water needs to be heated to boiling

Arsenic, commonly known as arsenic, is a non-metallic element, located in the periodic table of chemical elements in the 4th period, group va, atomic number 33, element symbol as, elemental in the form of three allotropes of gray arsenic, black arsenic and yellow arsenic. Arsenic is widely present in nature, and hundreds of arsenic minerals have been discovered. Arsenic and its compounds are used in pesticides, herbicides, insecticides, and many other alloys.

Its compound, arsenic trioxide, known as arsenic, is a very toxic substance.

On October 27, 2017, the World Health Organization's International Agency for Research on Cancer (IARC) published a preliminary list of carcinogens, and arsenic and inorganic arsenic compounds were included in the list of a class of carcinogens. On July 23, 2019, arsenic and arsenic compounds were included in the list of toxic and harmful water pollutants (the first batch).