When defining the term that concerns us, the first thing we have to do is determine its etymological origin. Specifically to find it we have to go to Latin because it resides there, more specifically it is placed in the word potency.
The power is the amount of job which is done by unit of time . It can be associated with the speed of a change of Energy within a system, or while delaying the completion of a job. Therefore, it is possible to affirm that the power is equal to the total energy divided by time.
It can be indicated that the power is the force , he power or the ability to get something. For example: “Batistuta was a very powerful forward who always scored goals”, "The new album of the Swedish band shows the power of their new drummer", "I think if I hit the ball with more power, I would have gotten another point.".
In this sense, it is worth emphasizing that in many occasions, and especially within what History is, certain nations or countries are spoken of as world powers. With this expression, what he wants to express is that those in question were or are very powerful and stand out for the remarkable influence they exert on the rest of the planet.
In this way, a phrase that could explain this is the following: "The United States is a world power at the moment but in the past there have been others much more powerful than her such as Germany, France or Spain."
A meaning that we are determining that also leads us to record an expression that exists in this political and historical field. We are referring to "from power to power." With this adverbial phrase, what is intended to be expressed is that two states or countries have been treated equally, that is, without one establishing itself as superior or above the other.
It is known as mechanical power to the work performed by an individual or a machine in a certain period of time. That is to say that it is the power that is transmitted through the actuation of a physical contact force or some related mechanical elements, such as a gear or a set of levers.
Another type of power that can be mentioned is the electric power , which is the result of multiplying the potential difference between the ends of a load and the current flowing there.
We can also refer to the sound power , which is calculated based on the intensity and surface area, and the single point power .
As for the power units, four large systems can be recognized. The international system of units, whose most frequent unit is the watt or watt and its multiples (kilowatt, megawatt, etc.), although you can also use equivalent combinations such as voltampere ; the English system, which measures by metric horsepower ; the unit technician, which is based on the international calorie per second ; and the cegesimal, which calculates erg per second .
Nor can we forget that in the field of Mathematics the use of the term power is frequent and it is that with it it comes to define an operation by which the result is determined that a number in question is multiplied by itself in Several occasions