In fact, the so-called "use" of a lot of knowledge, just like mathematics, is a kind of "useless use" and one of the necessary knowledge systems for a person with a sound way of thinking. Because of mathematics, physics, chemistry, and a lot of knowledge that you can't use in your later life and study, your knowledge system is complete, your way of thinking has been trained, and your understanding of the world is becoming more and more real!
Don't think that mathematics has nothing to do with beauty, nor that physics has nothing to do with philosophy: mathematics embodies the most perfect symmetry and balance. At the end of the discussion, physical problems, such as where "time" begins, become philosophical problems! Therefore, there are no useless subjects, and each subject is approaching the truth in its own way. The more ways you approach the truth, the more likely you are to explore a more comprehensive truth, which is one of the meanings of life!
For example, when you grow up, you will meet several opposite sex, fall in love with them, and finally form a happy marriage with one of the lucky guys. However, you can't say it's useless to fall in love with several other people. It is those emotions that make you understand love and find true love.
In the same way, no matter what your future career is, mathematics is your "unmarried heterosexual friend". What you should do now is to learn it well-talk to it even if you don't succeed!
Of course, physics is very useful. You use it every day. Of course, you don't have to realize that this is physics or just using physics. We can start with primitive people.
Primitive man drilled wood to make fire, using the principle of friction and heat.
Principle of sharpening knives by pressure in the iron age
Buoyancy principle of running water gold mining
. . . . . . . . Wait, that's too much.
Even David's magic has many optical things.
You usually squeeze the bus, and it may be better to squeeze if you know the principle of superiority.
More importantly, "the most important thing in learning physics is the way of thinking", which will play a great role in improving your problem-solving ability in your future work. How to use chemical nail polish without falling off for a long time: before applying nail polish, wipe your nails with cotton dipped in vinegar, and then apply nail polish when the vinegar is dry, so that nail polish will not fall off easily.
Sweaters wear for a long time, and some parts will be polished. You can spray a mixture of vinegar and water on the shiny part, then clean it and restore it to its original state.
When steamed, steamed bread will turn yellow. You can add a proper amount of vinegar to the pot, and the steamed bread will turn white after steaming for a while.
When stewing bone soup, add a few drops of vinegar for easy absorption. The main component of bone is calcium hydroxyphosphate, which can be converted into calcium salt easily absorbed by people by adding acetic acid.
Vinegar also plays a great role. In addition to seasoning, it can also help the human body digest. In addition, the main component of vinegar is acetic acid, which is corrosive and can eliminate the dirt on the inner wall of thermos bottles and pressure cookers.