Nowadays it is the standard metric system. The SI is the abbreviation for Système International d'Unités. That is why scientists are holding up with the precise definition, but that is very difficult, because it is too difficult to refer on a nature constant. There is a risk that the value of the kilogram could change. It is an instable unit, because is isn't based on a nature constant. Nowadays the kilogram is a block of platinum-iridium that is kept in Sèvres, France. Later the definition was rejected, because is was not so exact. The gram was exactly one thousandth of a grave, so the new unit was kilogram, in other words: 1000 gram. This did not seem to be so practical at all and that is why they wanted go back to the grave, but with a new name. This unit is equal to one milliliter of water. That is why they have rejected the grave and introduced a new unit. The French thought that the unit was too big and thought that it could give problems with trading and daily use. The volume unit liter is derived from the unit of length.
The unit supposed to be equal to one liter of water. The mass has a strange unit, because in the unit is a prefix. You can measure the mass in kilograms with a mass balance and the weight with a weigh-beam in Newton. If you weigh a mass on the moon, it will be 6 times lighter than on earth, because there is the gravity six times smaller. On earth is the gravity is not equal everywhere, so the weight is not equal everywhere, but the mass is. The weight is proportional with the gravitation. Often the mass and weights are confused with each other. One liter water weights according the present norms 0.998 kg. Since 1901 is the kilogram a block of platinum-iridium saved in France. (1e CGPM (1889))Įarly the kilogram was defined as the mass of a cubic decimeter water. The kilogram is the unit of mass it is equal to the mass of the international prototype of the kilogram.
Use this conversion program to convert units like kilogram to carat of pound or stone as alternative for a metric conversion table / chart. This metric system conversion calculator for weights and measure can be used for converting: Separation and Concentration Purification Request.Plant Inspection & Process Optimalisation.Kilograms can be abbreviated as kg for example, 1 kilogram can be written as 1 kg. In the metric system, "kilo" is the prefix for 10 3. The kilogram, or kilogramme, is the SI base unit for weight and is also a multiple of the gram. It is roughly equal to the mass of 1,000 cubic centimeters of water. The 2019 SI brochure now defines the kilogram using the Planck constant, and it is defined using the meter and second. One kilogram was previously equal to the mass of the platinum-iridium bar, known as the International Prototype of the Kilogram, which was stored in Sèvres, France. The definition of the kilogram changed in 2019. For example, 1 pound can be written as 1 lb, 1 lbs, 1 lb m, or 1 #. Pounds can be abbreviated as lb, and are also sometimes abbreviated as lbs, lb m, or #. A pound is sometimes also referred to as a common ounce. The pound is a US customary and imperial unit of weight. In the avoirdupois or apothecaries' systems, one pound is equal to 7,000 grains. One pound is equal to 16 ounces, or 0.45359237 kilograms. The National Bureau of Standards approved the international definition of the pound for use in the United States in 1959 after an agreement between six nations referred to as the International Yard and Pound Agreement. Pounds are a widely used unit of mass/weight in the United States.
0 kommentar(er)
