The answers to the 20 spinning top notes are as follows:

1. Introduction

The spinning top is one of the earliest entertainment tools among Chinese folk, also known as top, also known as top in Hokkien. It is called "Qian Le", and in the north it is called "Bingyi (gá)" or "Da Lao Niu". The Wuqiao area in Hebei is called bo. In Guizhou and other local dialects, it is called géluō.

It is called delou in Puyang area of ??Henan Province, and Pi Laojian in the dialect of Jiaozuo area. The Beijing area is called "Welding Tip", firstly because there are metal solder joints at the tip, and secondly because Beijing people hope that their children will understand from an early age that "traitors" will be whipped by everyone.

The upper part of the shape is round and the lower part is sharp. In the past, they were mostly made of wood, but now they are mostly made of plastic or iron. When playing, you can wrap it with a rope and pull the rope hard to make it rotate upright. Or use the elasticity of the spring to rotate. Traditional ancient tops are roughly inverted conical shapes made of wood or iron, and are played by splitting them with a whip. Modern gyroscopes are launched with transmitters. Of course, there are also some "hand spinning tops" that are very popular. Top is a very familiar toy for teenagers.

2. History of tops

In the Jin Dynasty more than 1,700 years ago, another interesting toy appeared in China-the bamboo dragonfly. After this toy was introduced to Europe in the 18th century, it was called "Chinese top" by Westerners. It can be seen that the real top was spread abroad earlier than this.

Why is the bamboo dragonfly called "Chinese top"? It was the French physicist Foucault in the mid-19th century who formally proposed the term "gyro". In English, gyro means "revolving body". A top is a gyroscope that spins on the ground, and a bamboo dragonfly is a gyroscope that spins in the air, so the bamboo dragonfly can also be said to be a kind of top.

From this point of view, any rotating body can be regarded as a top. For example, the diabolo we play, spinning discs, playing plates, throwing hats, and rapidly rotating ballet in acrobatics all use the principle of tops. We can see spinning tops everywhere in the world around us. Everything as small as an atom or as large as the earth can be seen as a rotating spiral.