en

base quantity

1

Terminological databases

Metroloogia terminibaas

ID 574474 Last modified 15.06.2024
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Domain Standardisation - Metrology
põhisuurus preferred
baassuurus variant
  • suurus antud suuruste süsteemist leppeliselt valitud alamhulgas, kus ühtki alamhulga suurust ei saa avaldada teiste suuruste kaudu
  • üks suurustest, mida mingis suuruste süsteemis leppeliselt käsitletakse üksteisest sõltumatuna
  • quantity in a conventionally chosen subset of a given system of quantities, where no subset quantity can be expressed in terms of the others
  • one of the quantities which, in a system of quantities, are conventionally accepted as independent of each other
  • quantity in a conventionally chosen subset of a given system of quantities, where no quantity in the subset can be expressed in terms of the other quantities within that subset
põhisuurus preferred
Usage examples
  • Põhisuurused ISQ-s on pikkus, mass, aeg, elektrivoolu tugevus, termodünaamiline temperatuur, ainehulk ja valgustugevus.
Good to know
  • Suurusi määratluses mainitud alamhulgas nimetatakse “põhisuuruste hulgaks”. Põhisuurusi peetakse vastastikku sõltumatuiks, kuna ühtki neist ei saa avaldada teiste põhisuuruste astmete korrutisena. Iga suuruste süsteemi korral võib “osiste arvu“ käsitleda põhisuurusena.
baassuurus variant
base quantity
Good to know
  • The subset mentioned in the definition is termed the “set of base quantities”. Base quantities are referred to as being mutually independent since a base quantity cannot be expressed as a product of powers of the other base quantities. "Number of entities" can be regarded as a base quantity in any system of quantities.

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