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IEVref:112-01-09ID:
Language:enStatus: Standard
Term: number of entities
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Definition: quantity involved in counting objects or events individually identified

NOTE 1 – A number of entities is a quantity of dimension one.

NOTE 2 – The quantity ”number of entities" can be regarded as a base quantity in any system of quantities.

NOTE 3 – The values of numbers of entities are expressed by integer numbers, but statistical elaborations may be carried out.

NOTE 4 – Examples of numbers of entities:
• number of inhabitants of a given country at a given date;
• number of turns in a coil;
• number of molecules in a given sample;
• degeneracy of the energy levels of a quantum system.



Publication date:2010-01
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