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Of the seven base units listed in table 1.1 only one the kilogram has a prefix see table 1.2 would it be wise to redefine the mass of the platinum iridium cylinder at the international bureau of weigh?
Wiki User
∙ 7y ago
No. It would certainly be POSSIBLE, but rescaling the system so that a (former) kilogram became known as a "gram" would be confusing. Renaming the unit to something else would be less confusing, but not worth the effort just for the foolish consistency of having the base unit be prefixless.
It could be argued that it might have been better had the unit been defined differently to start with, but it's a bit late in the game for that now.
Wiki User
∙ 7y ago
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Why is it important that scientists in different countries check their ways of measuring a KG against the same standard mass?
When someone describes something as having a mass of one kilogram, it is important that everyone else understands what one kilogram is. Therefore there has to be an agreed definition of a kilogram. This means there has to be a standard kilogram that everyone can use to set their own kilogram. At present the standard kilogram is a block of platinum held in Paris, there are plans to redefine the kilogram in terms of the reaction between a fixed magnet and the magnetic field set up by an electric current passing through a wire, the kilogram will still weigh the same but the means of setting it will change.
What is the new name for the metric system used around the world?
The current version of the metric system dates from 1960 and is known as SI, from the french Système international d'unités.The SI system is used throughout the world, and even the three countries yet to adopt it define their own system of measurements in terms of SI units.The SI is an evolving system and is open to change, for instance the definition of the kilogram is under review. Currently it is the mass of a standard piece of metal in Paris, it is proposed to redefine it in terms of the Plank constant; the kilogram will stay the same, but the way to check it will change.
Possible units for measuring mass in the metric system?
The metric system has two commonly used measures of mass. The first is the gram (g), and the other is the SI standardized unit of kilogram (kg). 1000 g equals 1 kilogram, and 1 g is .001 kg. Mass is the amount of matter in a sample, and it should not be confused with weight, which is a force (F). The SI unit for F is derived through mass is the Newton (N).
How was the gram established?
Concepts similar to those behind the metric system had been discussed in the 16th and 17th centuries. Simon Stevin had published his ideas for a decimal notation and John Wilkins had published a proposal for a decimal system of measurement based on natural units. The first practical realisation of the metric system came in 1799, during the French Revolution, when the existing system of measure, which had fallen into disrepute, was temporarily replaced by a decimal system based on the kilogram and the metre. The work of reforming the old system of weights and measures was sponsored by the revolutionary government, including the approval of Louis XVI before his fall from power. The metric system was to be, in the words of philosopher and mathematician Condorcet, "for all people for all time". In the era of humanism, the basic units were taken from the natural world: the unit of length, the metre, was based on the dimensions of the Earth, and the unit of mass, the kilogram, was based on the mass of water having a volume of one litre or one thousandth of a cubic metre. Reference copies for both units were manufactured and placed in the custody of the French Academy of Sciences. By 1812, due to the unpopularity of the new metric system, France had reverted to units similar to those of their old system.In 1837 the metric system was re-adopted by France, and also during the first half of the 19th century was adopted by the scientific community. In the middle of the century, James Clerk Maxwell put forward the concept of a coherent system where a small number of units of measure were defined as base units, and all other units of measure, called derived units, were defined in terms of the base units. Maxwell proposed three base units: length, mass and time. This concept worked well with mechanics, but attempts to describe electromagnetic forcesin terms of these units encountered difficulties. By the end of the 19th century, four principal variants of the metric system were in use for the measurement of electromagnetic phenomena: three based on the centimetre-gram-second system of units (CGS system), and one on the metre-kilogram-second system of units (MKS system). This impasse was resolved by Giovanni Giorgi, who in 1901 proved that a coherent system that incorporated electromagnetic units had to have an electromagnetic unit as a fourth base unit.Until 1875, the French government owned the prototype metre and kilogram, but in that year the Convention of the metrewas signed, and control of the standards relating to mass and length passed to a trio of inter-governmental organisations, the senior of which was the General Conference on Weights and Measures (in French the Conférence générale des poids et mesures or CGPM). During the first half of the 20th century, the CGPM cooperated with a number of other organisations, and by 1960 it had responsibility for defining temporal, electrical, thermal, molecular and luminar measurements, while other international organisations continued their roles in how these units of measurement were used.In 1960, the CGPM launched the International System of Units (in French the Système international d'unités or SI) which had six "base units": the metre, kilogram, second, ampere, degree Kelvin (subsequently renamed the "kelvin") and candela; as well as 22 further units derived from the base units. The mole was added as a seventh base unit in 1971. During this period, the metre was redefined in terms of the wavelength of the waves from a particular light source, and the second was defined in terms of the frequency of radiation from another light source. Since the end of the 20th century, an effort has been undertaken to redefine the ampere, kilogram, mole and kelvin in terms of the basic constants of physics.
What is the country where the metric system was first developed?
The origins of the metric system date back to the sixteenth century when, Simon Stevin published details of his decimal notation, and the seventeenth century when John Wilkins published a proposal for a decimal system of measurement based on natural units. The first practical realisation of the metric system came during the French Revolution, when the existing system of measure which had fallen into disrepute was replaced by a decimal system based on the kilogram and the metre. The metric system was, in the words of philosopher and mathematician Condorcet, "for all people for all time". The unit of length, the metre, was based on the dimensions of the Earth, and the unit of mass, the kilogram, was based on the mass of water having a volume of one litre or one thousandth of a cubic metre. Reference copies for both units were manufactured and placed in the custody of the French Academy of Sciences.During the first half of the nineteenth century, the metric system was adopted by the scientific community. In the middle of the century, James Clerk Maxwell put forward the concept of a coherent system where a small number of units of measure were defined as base units, and all other units of measure, called derived units, were defined in terms of the base units. Maxwell proposed three base units - length, mass and time. This concept worked well with mechanics, but attempts to describe electromagnetic forces in terms of these units were beset with difficulties. By the end of the nineteenth century, four principal variants of the metric system were in place for the measurement of electromagnetic phenomena, three based on the centimetre-gram-second system of units(CGS system), and one on the metre-kilogram-second system of units (MKS system). This impasse was resolved by Giovanni Giorgi, who in 1901 proved that a coherent system that incorporated electromagnetic units had to have an electromagnetic unit as the fourth base unit.Until 1875, the French government owned the prototype metre and kilogram, but in that year the Convention of the metre was signed, and control of the standards relating to mass and length passed to a trio of inter-governmental organisations, the senior of which was the General Conference on Weights and Measures (in French the Conférence générale des poids et mesures or CGPM). During the first half of the twentieth century, the CGPM cooperated with a number of other organisations, and by 1960 it had responsibility for defining temporal, electrical, thermal, molecular and luminar measurements, while other international organisations continued their roles in how these units of measurement were used.In 1960, the CGPM launched the International System of Units(in French the Système international d'unités or SI) which had six base units, the metre, kilogram, second, ampere, degree kelvin (subsequently renamed the "kelvin") and candela, and 22 derived units. The mole was added as a seventh base unit in 1971. During this period, the metre was redefined in terms of the wavelength of the waves from a particular light source, and the second was defined in terms of the frequency of radiation from another light source. By the end of the century, work was well under way to redefine the ampere, kilogram, mole and kelvin in terms of the basic constants of physics, thereby ensuring that all the base units were in theory available to everybody. It is expected that this work will be completed by 2014.
What element was used to redefine a meter?
Platinum-Iridium Alloy (9:1 ratio)
Why is it important that scientists in different countries check their ways of measuring a KG against the same standard mass?
When someone describes something as having a mass of one kilogram, it is important that everyone else understands what one kilogram is. Therefore there has to be an agreed definition of a kilogram. This means there has to be a standard kilogram that everyone can use to set their own kilogram. At present the standard kilogram is a block of platinum held in Paris, there are plans to redefine the kilogram in terms of the reaction between a fixed magnet and the magnetic field set up by an electric current passing through a wire, the kilogram will still weigh the same but the means of setting it will change.
What is the Latin for redefine?
redefine
How many liters of hydrogen in kilogram of hydrogen?
You need to redefine your question. A litre is a unit of volume and a kilogram is a unit of mass, so you have to know how densely compressed the hydrogen is before you can make a valid comparison of mass and volume. See Boyle's-Charles' Law.
When was Redefine - song - created?
Redefine - song - was created in 2002.
When was Redefine - Soil album - created?
Redefine - Soil album - was created on 2004-03-23.
How do you solve the unsolvable?
redefine assumptions.
What is a prefix for define?
A prefix for "define" is "re-".
What is the new name for the metric system used around the world?
The current version of the metric system dates from 1960 and is known as SI, from the french Système international d'unités.The SI system is used throughout the world, and even the three countries yet to adopt it define their own system of measurements in terms of SI units.The SI is an evolving system and is open to change, for instance the definition of the kilogram is under review. Currently it is the mass of a standard piece of metal in Paris, it is proposed to redefine it in terms of the Plank constant; the kilogram will stay the same, but the way to check it will change.
How do you spell redifine?
The word is spelled redefine.
What type of Browning Superposed with serial?
Please redefine the question
How is Grand Theft Auto prejudice?
Please redefine your question!
