Article | REF: 23 V3

Units of Measurements SI

Author: Marie-France Terrier

Publication date: April 10, 2024

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


Français

1. General definitions

1.1 Size and unity

A magnitude is an attribute of a phenomenon, body or substance that can be distinguished qualitatively and determined quantitatively. The term magnitude can refer to a quantity in a general sense, e.g. length, time, mass, electrical resistance, etc., or to a particular quantity, e.g. the length of a given rod, the electrical resistance of a given sample of wire. Quantities that can be ranked in relation to each other in ascending (or descending) order are called quantities of the same kind.

The unit of measurement is a particular quantity, defined and adopted by convention, to which other quantities of the same kind are compared in order to express them quantitatively in relation to this quantity.

...
You do not have access to this resource.

Exclusive to subscribers. 97% yet to be discovered!

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


The Ultimate Scientific and Technical Reference

A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors
+ More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year
From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

This article is included in

Physics of energy

This offer includes:

Knowledge Base

Updated and enriched with articles validated by our scientific committees

Services

A set of exclusive tools to complement the resources

Practical Path

Operational and didactic, to guarantee the acquisition of transversal skills

Doc & Quiz

Interactive articles with quizzes, for constructive reading

Subscribe now!

Ongoing reading
General definitions
Outline