Kilogram

The kilogram is the basic unit of mass in the SI system, equal to 1000 grams and defined as the mass of the international prototype of the kilogram, which is kept at the International Bureau of Weights and Measures (in Sèvres, near Paris) and is a platinum-iridium alloy in the form of a cylindrical weight. Designation: kg.

The kilogram (kg) is the basic SI unit of mass, equal to 1000 grams and defined as the mass of the international prototype of the kilogram, which is kept at the International Bureau of Weights and Measures (at Sèvres, near Paris) and is a platinum-iridium alloy in the form of a cylindrical weight.

The kilogram was introduced in 1795 along with the metric system of measures. 1 liter of pure water at the melting temperature of ice was chosen as a standard. Thus, the mass of 1 liter of water at the melting temperature of ice was taken to be 1 kg.

In 1889, the First General Conference on Weights and Measures adopted the international prototype of the kilogram, made of a platinum-iridium alloy. This prototype is still used today as the standard for the mass of the kilogram.

However, over time, the mass of the prototype changed slightly due to the adsorption of contaminants from the surface. Therefore, work is currently underway to redefine the kilogram through fundamental physical constants.

The kilogram is the basic unit of mass in the International System of Units (SI). It is equal to 1000 grams and is defined as the mass of the international prototypical kilogram kept at the International Bureau of Weights and Measures in Sèvres (near Paris).

The kilogram was introduced in 1790 and was chosen as the SI base unit of mass in 1954. It became the international unit of mass, replacing the outdated system of measurement based on the weight of water.

The platinum-iridium weight held by the International Bureau is the prototype of the kilogram and is used to calibrate other measures of mass. It was created in 1889 and has since been used to define the kilogram and other units of measurement.

The symbol for kilogram is kg. It is short for the Latin word “kilo,” which means “thousand.” The notation kg is used in all countries that use the SI, as well as in other countries that have adopted the SI as their system of measurement.

In conclusion, the kilogram is a unit of mass that is fundamental to the SI system. It is defined as the mass of the prototype kilogram and is used in various fields of science and technology.