Questions related to the study of physics and mathematics

Brother, I sympathize with you. I'm a grade below you, but I have the same experience as you, so we'll have something in common. I used to cry about physics, and I still hate my math teacher.

However, there are many ways to do this, such as what the upstairs one told you. If you survive this time, when you go to college or even a doctorate in the future, you will smile indifferently, it turns out that the knowledge of high school is not difficult, but why did I worry about it in the first place. This is because, when people face higher challenges, the infinite potential in people's bodies will be stimulated.

If life has never experienced wind and rain, and has never been tested by difficulties, life will be very boring, is that kind of life a complete life! If you don't like the teacher, you can strengthen the communication with your classmates, and through the dialogue, you will gradually build up your self-confidence, and then gradually start to be interested in the course. You'll find that you're starting to like it!

You didn't think you could like a class, but you found that when you got good grades, your teacher became gentler, and gradually you figured it out that you should be more broad-minded, how could you give up such an interesting and challenging subject as science because of a small thing? People who study science are strong people who dare to challenge life and face difficulties. Brother, if you can't figure it out again, come to the younger brother again.

I'm here to help!

Everything is interconnected, and the relationship between mathematics and physics is no exception.

Mathematics is a tool and means of physical research. Some research methods in physics have strong mathematical ideas, so the process of learning physics can also improve mathematical cognition.

Mathematics plays an important role in the development of physics, and physics also plays an important role in the development of mathematics:

1. As Morse said, "Mathematics is mathematics and physics is physics, but physics can benefit through the abstraction of mathematics, and mathematics can benefit through the insight of physics." ”

2. The mathematician Lax said: "The relationship between mathematics and physics is particularly strong, and the reason is that the subject of mathematics is, after all, some problems, and many mathematical problems arise from physics, and more than that, many mathematical theories are developed to deal with profound physical problems." ”

Answer]: C Positive transfer, also known as "facilitated transfer", refers to the positive effect of one type of learning on another. For example, learning mathematics is conducive to learning physics, learning abacus is conducive to mental arithmetic, and mastering plane geometry is conducive to mastering three-dimensional geometry.

Negative transfer generally refers to one type of learning interfering with or inhibiting another. Variation is the manifestation of the non-essential characteristics of the object through the hail command, so that students can think in the variation, so as to grasp the essence and laws of things. Stereotype, also known as "habitual thinking", is a special state of mental readiness for an activity, or a tendency to activity, caused by previous activity.

It has both positive and negative effects.

I'm so excited, finally someone is in the same situation as me. I really, really like physics! Belongs to the kind of people who take a break by doing physics problems.

But I also really, really hate math, thinking that I was not good at math since I had factoring, and I really didn't understand why I had to change the quadratic trinomial into two factors when they were all the same result.

But my math is not bad, I got a perfect score in math in the high school entrance examination, and I also did well in math in the college entrance examination, anyway, it is better than physics that I have always been good at. (Physics has become an eternal regret in my heart.) ）

I think if you think you're not putting as much effort into math as you do in physics, then you should work on your own. Don't just study physics because you think it's fun in high school. If you feel that your understanding of mathematics is really inferior to that of physics, I don't think you need to force it.

If you don't have a positive attitude to meet it, you can also overcome it in a negative way. As long as you work hard enough, you'll only resent math and won't let it drag you down. There is a tactic called question naval battle, and sometimes you don't have to be very clear to be able to make a question.

Just like when I was taking the exam, I was so painful that I did a lot of questions, and the effect was very, very good, so that in the end I could almost be taken down all the question types on the whole paper, and you said that I was all down, and there was nothing I could do. It's just that it's really painful, and the time to take the exam is also very limited, so I don't have much time to specialize in mathematics because I can do it in other subjects. So if you're not really a hopeless person like me who has no cure for mathematics, it's still important to understand.

I think the guys upstairs should be math experts, so you better listen to them.

The above is a method that a person who is completely desperate for his own mathematics to find out for the exam, although it is very, very effective, but if you still have hope for your mathematical comprehension, I do not approve of you using this question for naval battles. At that time, the high school entrance examination was because there was a devil-like teacher staring at the back, so the effect was very good, and when I took the college entrance examination, the teacher was kind and pleasant, and the effect of my own question naval battle was not as good as last time, and it was really difficult for me to stick to it. . .

But I also want to say that although physics and mathematics have different ways of thinking, physics has many times that require various mathematical skills, those more special operation methods, what the limit, trigonometric transformation, must be figured out, roll with answers, otherwise you can understand everything when you do physics, but you can't calculate the final answer, and it's also very depressing. Or someone else will come out after a calculation, and you will work hard here for a long time, and the result is still wrong, then it will be even more depressing. If you go to college and you choose a major in science, you will understand why calculus was invented by the great physicist Newton, and not by a mathematician.

Therefore, if you want to really study science, you must not give up on mathematics.

There is no absoluteism in everything, and hard work is directly proportional to Minda's dedication. Although mathematics and physics are both science subjects, it does not mean that physics is good, mathematics must be good, and it depends on the individual's understanding ability and learning level.

If you learn mathematics, physics and chemistry well, you are not afraid to go all over the world, and those who can learn physics well may not be bad at mathematics, right? This sentence is not absolute, though? But it makes sense that it will be difficult to get together! Because the old debate is mathematics, physics and chemistry are inseparable? It's a border!

Physics: 1Solution: Calculate the brine density p=m v=60g 50cm3=according to the sample data

The density of the brine is too high and does not meet the requirements, so water should be added.

The original quality of the brine was m=pv=

Suppose x grams of water are added, which is x milliliters, and the formula p=m v (x+60000) (x+50000)=

x=50000g=50kg

But I don't know the version is the same as not oh math 1

Solution: Let the width be x meters and the length be (x + 2) meters.

The equation is listed according to the area of the rectangle).

x（x+2）=120

x²+2x=120

Use the matching method to solve).

x²+2x+1²=120+1²

x+1)²=121

x+1=11

x=10x+2=12

A: ......

Physics: v = s t, this is the definition, s = v0t + 1 2at2, then, v = v0 + 1 2at, and v = v0 + at, deformation to get a = (v-v0) t, substitution v mean = (v0 + v) 2

First question.

In uniform acceleration linear motion or uniform decreasing linear motion, velocity v=v0+at, a is a known quantity, t is the amount of change, and it can be seen that things are a straight line in the drawing, and the midpoint in mathematics is the average velocity v in uniform acceleration linear motion or uniform decreasing linear motion.

Second question.

y=(2x-1) is defined in the domain [-1,1].

1<=x<=1

3<=2x-1<=1

The domain of the function y=f(x-2).

3<=x-2<=1

1<=x<=3

So the domain of the function y=f(x-2) is [-1,3].

According to f=maThere is acceleration when there is force, so it is called acceleration curve motion, in fact, the velocity is equal, but the direction of the velocity is always changing.

Assuming that the root number 2 is a rational number, let the root number 2 = p stool q (the simplest fraction), and the two sides will be evenly disorganized.

Get 2=p squared and hail q squared, that is, 2q squared = p squared, so that this is a multiple of 2, and p square is a multiple of 4, so q square is also a multiple of 2, and q is also a multiple of 2, so p q is not the simplest fraction. Contradiction.

Mathematics, try to listen in class, if you don't understand, take the questions left by the teacher or the after-class questions, follow the example questions, do a few more, and gradually increase the difficulty after the meeting, pay attention to the formula theorem. It's hard to talk about physics, I used to study literature.

Start simple and work your way up one by one.

We learn well by working half as hard as others.