With the development of our modern society and people's economy, almost every family drives a car. But we all know. The car needs gas. You can't drive without refueling. But you know what? Why do cars need gasoline? Why can't the car start without refueling? This question has been hovering in my mind, until today I finally solved the mystery.

For this answer, I tried my best to ask my friends and parents. Finally, I even looked it up online and finally got the answer I wanted.

Because the power source of the car is the engine, and the rotation of the engine depends on the combustion of gasoline or diesel in the engine to make the engine rotate, thus making the car run. So the car needs gas.

There is a more detailed explanation: oil can be burned to provide power for internal combustion engines, and the violent oxidation reaction between combustible substances and oxygen in the air is called combustion. But this is very narrow. Generally speaking, combustion needs oxygen, but in some special cases, combustion can be carried out under oxygen-free conditions, such as the combustion of hydrogen in chlorine gas and the combustion of magnesium rods in carbon dioxide.

I see. The oil in the car burns in the engine first, and then drives the engine to start the car. The power of the car comes from the engine, so as soon as the engine starts the car, the car can start. This solves the problem of why the car needs to refuel, why it doesn't refuel, and it won't start after refueling.

This is really interesting. It turns out that there are many similar problems in our life, which need our serious consideration and answer. As long as we work hard, there is no answer that we can't get.