The meter is a tool that allows measuring lengths.
The first step we are going to take to know the meaning of the term meter is to discover its etymological origin. In this case, we have to emphasize that it is a word that derives from Greek, specifically from "metron", which can be translated as "measure".
The concept of meter has different meanings. It can refer, for example, to the unit of length that is part of the international system.
The meter as a unit of measurement
Originally, the meter was defined as one ten millionth of the quadrant of the Earth 's meridian. Then it was decided to give greater precision to the unit: that is why, currently, the meter is equivalent to the distance that light traverses in a vacuum in a period of 1/299,792,458 of a second.
This last definition of meter was adopted within the framework of the XVII General Conference on Weights and Measures that took place in 1983 . The symbol for meter, on the other hand, is m .
The meter has multiples such as decameter , hectometer and kilometer , and submultiples such as millimeter , centimeter and decimeter . The use of one or the other depends on the convenience of each case .
A subway is a train that runs through a city, either outdoors or underground.
A tool and a quantity
The tool used to measure lengths is also called a meter. For example: "Pass me the meter, please, I must take the measurements of the furniture," "I suggest you use the meter to mark on the wall where you should make the holes."
Meter, on the other hand, is the quantity of something whose length is equal to one meter: "My grandmother gave me five meters of fabric to make the curtains," "The ship is equipped with fifty meters of fishing nets."
The subway as a means of transportation
The idea of metro, on the other hand, can be used to refer to the metropolitan . This is what the train that takes an open-air or underground tour of a city is called in some regions: "To go to the stadium you can take the subway," "The subway was delayed due to an accident and I was late for work."
Thousands of cities around the world have the subway as one of their main means of public transportation . This is considered to bring with it a series of important advantages, among which are the following:
-It is considered to pollute less than a private vehicle.
-At the citizen level, it is cheaper to travel by metro than by taxi or your own car, for example.
-In the same way, we must highlight the fact that it allows you to move around the city more quickly.
-It is a means of transport with a large capacity, which means that it can transport many people at the same time from one place to another.
In addition, it is interesting to know some curiosities about the metro, such as the following:
-The three largest subways in all of Europe are those in Paris, London and Madrid. In the latter, the station that is built at the greatest depth is Cuatro Caminos, which is located in what would correspond to a 20-story building.
-The Russian metro is considered the most spectacular in the world. It was inaugurated in 1935. In addition, it is one of the most used on the planet as it transports about seven million travelers every day.