What is the weight of 1 kg?
A kilogram (kg) is a metric base SI (System International) unit of mass. A kilogram is also known as a kilo, and it was defined as mass of 1 liter or water in 1795. A few years later in 1799, the prototype of 1 kilogram was made and maintained in France. The rest of the world used to have a copy of the prototype made, and maintained locally.
What is a kilogram (unit)?
In 1889 a new international standard for the kilogram, a metal bar made of platinum iridium, was agreed to; President Benjamin Harrison officially received the 1-kilogram cylinder for the U.S. in 1890. But no one uses that bar very often; for all practical purposes, a kilogram equals 2.2 pounds.
What is the relationship between kg and lb?
Mass is defined as the amount of matter in an object while weight is defined as the force exerted by an object. SI unit of mass is kilograms while SI unit of weight is Newtons. Object weighing 1 kg mass will have 9.8 N weight.
How to measure kilogram mass?
1 kilogram-weight corresponds to the weight of 1 kilogram mass on earth. F = ma F = (1kg)(9.8ms-2) 1 kg-wt = 9.8 N
What weight is a kilogram?
kilogram (kg), basic unit of mass in the metric system. A kilogram is very nearly equal (it was originally intended to be exactly equal) to the mass of 1,000 cubic cm of water. The pound is defined as equal to 0.45359237 kg, exactly.
What does 1 kg mean in weight?
2.20462262185 pounds1 kilogram (kg) is equal to 2.20462262185 pounds (lbs). 1 kg = 2.20462262185 lb. The mass m in pounds (lb) is equal to the mass m in kilograms (kg) divided by 0.45359237: m(lb) = m(kg) / 0.45359237.
Is 5 kilos heavy?
How heavy is 5 kilograms? A gallon of paint weighs about 5 kg. Every day, 10,000,000 L (3,000,000 gal) of paint are applied in the United States. The average domestic cat should weigh about 4.5 kg.
What is my weight from kg to pounds?
1 kilogram is equal to 2.20462262 pounds, which is the conversion factor from kilograms to pounds.
Overview
Redefinition based on fundamental constants
The replacement of the International Prototype of the Kilogram as the primary standard was motivated by evidence accumulated over a long period of time that the mass of the IPK and its replicas had been changing; the IPK had diverged from its replicas by approximately 50 micrograms since their manufacture late in the 19th century. This led to several competing effortsto d…
Definition
The kilogram is defined in terms of three fundamental physical constants: The speed of light c, a specific atomic transition frequency ΔνCs, and the Planck constant h.
According to the General Conference on Weights and Measures (CGPM)
The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.62607015×10 when expressed in the unit J⋅s, which is equal to kg⋅…
Name and terminology
The kilogram is the only base SI unit with an SI prefix (kilo) as part of its name. The word kilogramme or kilogram is derived from the French kilogramme, which itself was a learned coinage, prefixing the Greek stem of χίλιοι khilioi "a thousand" to gramma, a Late Latin term for "a small weight", itself from Greek γράμμα. The word kilogramme was written into French law in 1795, in the Decree of 18 Germinal, which revised the provisional system of units introduced by the French National …
Kilogram becoming a base unit: the role of units for electromagnetism
It is primarily because of units for electromagnetism that the kilogram rather than the gram was eventually adopted as the base unit of mass in the SI. The relevant series of discussions and decisions started roughly in the 1850s and effectively concluded in 1946. By the end of the 19th century, the 'practical units' for electric and magnetic quantities such as the ampere and the volt were well established in practical use (e.g. for telegraphy). Unfortunately, they were not coherentwith …
SI multiples
Because an SI unit may not have multiple prefixes (see SI prefix), prefixes are added to gram, rather than the base unit kilogram, which already has a prefix as part of its name. For instance, one-millionth of a kilogram is 1 mg (one milligram), not 1 μkg (one microkilogram).
• The microgram is typically abbreviated "mcg" in pharmaceutical and nutritional supplement labelling, to avoid confusion, since the "μ" prefix is not always well recognised outside of technic…
See also
• 1795 in science
• 1799 in science
• General Conference on Weights and Measures (CGPM)
• Gram
• Grave (original name of the kilogram, its history)
Notes
1. ^ The avoirdupois pound is part of both United States customary system of units and the Imperial system of units. It is defined as exactly 0.45359237 kilograms.
2. ^ The French text (which is the authoritative text) states "Il n'est pas autorisé d'utiliser des abréviations pour les symboles et noms d'unités ..."