Wheels are essential in most means of transportation.
A wheel (from the Latin rota ) is a mechanical object that is shaped like a disc and is installed on an axle so that it rotates around it. It is possible to estimate that each wheel is a simple machine or that the wheels are one more piece within a more complex machine.
The wheel is considered a transcendental invention for the development of human beings. It was designed around the end of the Neolithic period, approximately in the 5th millennium BC. At first it was used in pottery and later its use was extended to the invention of means of transportation.
The first wheels
The primitive wheels were made of wood and had a hole in the middle, which allowed them to be inserted into an axle. A decisive step for the development of the wheel was the inclusion of spokes or spokes , which are the bars that rigidly join the center of the wheel with its perimeter region. Radios helped build lighter and, therefore, faster vehicles.
Iron and bronze were other materials used in the construction of wheels. In the last decades of the 19th century, the first tires for wheels were created, which are the rubber covers that cover the wheel and offer the grip and friction suitable for the pavement .
A fair attraction that allows you to see the surrounding landscape is known as a Ferris wheel, around the world or ferris wheel.
Various uses of the term
The concept we study has also become the central axis of a series of expressions that are part of our daily lives. This would be the case, for example, of the so-called wheel of fortune , which is a term that refers to the fact that life is continually marked by destiny and chance, in such a way that man alternates good and bad moments. bad in their existence.
In addition there is also the so-called press conference . This is an expression used in the journalistic field that comes to define that meeting of media professionals that takes place based on a call made by a public figure. The objective of this meeting is for this character to make a series of statements on a topic of interest and to subsequently answer the questions asked by the reporters present.
The concept of a circle, on the other hand, is used to refer to the circle of individuals or objects: "The president presented his resignation at a press conference," "A conference of doctors was called spontaneously to decide what to do with the sick without care» , «Call the rest of the team: the captain wants to form a circle so that we can talk face to face with each other» .
The wheel in the animal world
We also cannot ignore the fact that there is a fish that is also known by the name of the wheel. Specifically, we are referring to a fish, also called sunfish , which is very common in the Mediterranean area and is characterized by having a circular, silver-colored body.
Continuing with the animal world, it must be emphasized that the term we are analyzing is the one that is used, in the same way, to refer to the shape that the peacock makes with its tail when it spreads its feathers as if it were a fan.