SI unit


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SI unit

any of the units adopted for international use under the Système International d'Unités, now employed for all scientific and most technical purposes. There are seven fundamental units: the metre, kilogram, second, ampere, kelvin, candela, and mole; and two supplementary units: the radian and the steradian. All other units are derived by multiplication or division of these units without the use of numerical factors
References in periodicals archive ?
The meter, symbol m, is the unit of length; its magnitude is set by fixing the numerical value of the speed of light in vacuum to be equal to exactly 299 792 458 when it is expressed in the SI unit m [s.
The unit of measure mg/L should be used only when referring to SI units or when national or international guidelines require or recommend that the concentration of an analyte be expressed in that unit of measure, such as for high-sensitivity C-reactive protein.
The combined equation shows a comparison of the SI unit of power--in terms of mass, time, and length, in the numerator--to the electrical unit of power.
The SI units of measurement are treated as mathematical entities (e.
31 of 2006, which states in Article VIII that the SI units will be the exclusive basis of the legal units of measurement in the country.
They pay particular attention to determining physical constants that are directly involved in the anticipated new definitions of the SI units of measurement, which will be based on fixed values to be assigned to fundamental constants.
We have spent billions of dollars over the last 20 years to adopt ISO standards for just about everything we do in industry, but we just cannot seem to let go of our antiquated system of units, with notable exceptions such as the automotive industry, where the change to SI units has been effectively mandated.
An influential decision was made to report IFCC results in SI units [millimoles of Hb [A.
Although electric and magnetic dimensions in systems CGSE and CGSM are expressed in the terms of mass, length, and time units (in SI units Ampere was added), they seem strange and bizarre.
Most metric units belong to the International System of Units (SI), and the liter, hectare, and metric ton are accepted for use with the SI units.
The DIVA automatically compensates for changes in steam density, providing 4-20-mA and pulsed outputs proportional to mass or energy flow, as well as real time display of steam pressure, temperature, flow rate and total flow in both English and SI units.