What does Kilogram mean
The kilogram refers to one of the basic units of the International System of Units, considered as the unit of mass.
The kilogram has been defined since 1889 by an international prototype, which is a cylinder of platinum and iridium which is currently preserved in the International Bureau of Weights and Measures in Paris.
The kilogram is the only unit that is still defined based on a physical pattern or object, since the rest of the units, such as meter, second, ampere, kelvin, mol and candela, are based on fundamental physical properties; for example, the meter is defined on the speed of light.
The kilogram is represented by the symbol Kg.
Measurements of the kilogram prototype in the last century have shown that its mass has varied slightly by about 50 micrograms less than when it was manufactured in 1879.
The International Bureau of Weights and Measures is aiming to redefine the unit of mass, with the aim of maintaining this unit stable, because this stability is crucial because it is the base from which many other units of weight are obtained.
There are also official copies, which are compared with the prototype every 10 years. In fact, it seems that the original prototype has lost about 50 micrograms in the last 100 years, with the cause being unknown.
The etymology of the term comes from ancient Greece, the word is made up of two parts, the first “kil” means “thousand”, and the second, “gramma” is translated “stone that can be weighed”, therefore Kilogram, are “a thousand stones that can be weighed”.
It is very common to use this term in everyday life. People often use it to know that a measure equivalent to one kilogram of meat, rice, milk powder, apples, pears, etc. is taken.
It also forms the basis from which many other units of weight are obtained.
Also, it should be noted that this unit consists of a series of multiples and submultiples. Thus, among the first are the decagram, the Hg or the ton.
And among the seconds are the decigram or the centigram, among others.
As far as equivalences are concerned, it should be emphasized that the kilogram, for example, is equal to one million milligrams, at 10,000 decigrams, at 1000 grams or at 10 hectograms.
The first definition of kilogram is given before the French Revolution, to express that it was the mass of a cubic decimeter of distilled water to an atmosphere of pressure and 3.98 degrees Celsius, at a very peculiar temperature taken with a thermometer, because this one temperature makes the water have a higher density than the regular atmospheric temperature.
It is thanks to this, that it reinvents the concept that we currently have. However, today, experiments are being carried out to define the kilogram by physical laws.
It is important to know, as for the Kilogram definition, that the term is closely related to what is kilopondium or kilopondium strength. In the field of science, and more specifically of physics, is where this last word is used, and it is defined as a unit of force within the Decimal Metric System.
In particular, the kilopondium is equivalent to the force acting on a mass of one kilogram which is subject to what is a situation of normal gravity.
The term kilopondium is scarcely used, both in the scientific and technical field as in everyday life.
Usually we will not hear “I weigh 70 kiloponds or kilograms-force” (which would be correct if we use the Technical Units System), or “I weight 686 N”, or “I have a mass of 70 kilograms” (if we use the SI).
But the common thing is to say: “I weigh 70 kilograms or kilos” (where kilogram is the unit mass of SI), although, technically, we are referring to kilograms-force, and not kilograms of mass.
In the latter, we must interpret the expression “kilos” as a colloquial shortening of kilograms-force or kiloponds, because we are talking about a weight; that is, of a force and not of a mass.