Αποτελέσματα Αναζήτησης
The SI comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol s, the unit of time ), metre (m, length ), kilogram (kg, mass ), ampere (A, electric current ), kelvin (K, thermodynamic temperature ), mole (mol, amount of substance ), and candela (cd, luminous intensity ).
12 Απρ 2010 · Learn about the International System of Units (SI), also known as the metric system, and its seven base units, defining constants, and derived units. Find resources for students and teachers, such as posters, quizzes, and activities.
13 Ιαν 2010 · Learn about the 24 SI prefixes that modify unit magnitude and their names, symbols, and factors. See the table of common metric prefixes and their place values, and the history and spelling of SI prefixes.
This publication lists the units of the International System of Units (SI), or metric system, recommended for use in trade and commerce and other general uses by the National Institute of Standards and Technology.
The International System of Units, universally abbreviated SI (from the French Le Système International d’Unités), is the modern metric system of measurement. The SI is the dominant measurement system used in science and international commerce. In recognition of this fact, Congress has designated the metric system of measurement as the
This guide provides essential data, rules and style conventions for printing and using SI units and prefixes. It also covers units outside the SI, such as degree Celsius, hour, liter, and electronvolt.
The SI is founded on seven SI base units for seven base quantities assumed to be mutually independent, as given in Table 1. Table 1. SI base units. For detailed information on the SI base units, see Definitions of the SI base units and their Historical context .
