et

ρ

1 [r`oo] symbol

Terminological databases

Metroloogia terminibaas

ID 572083 Last modified 27.09.2026
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Domain Standardisation - Metrology
tihedus preferred
ρ
erikaal former
mahukaal deprecated
density preferred
mass density
volumetric mass density
volumic mass
ρ
specific mass variant
weight density former
unit weight former
volumetric weight deprecated
  • mass ruumalaühiku kohta väljendatuna kilogrammides kuupmeetri kohta või grammides milliliitri kohta temperatuuril 15 0C ja rõhul 101,325 kPa
  • ISQ tuletatud suurus
  • substance is its mass per unit volume
  • at a given point within a three-dimensional domain of quasi-infinitesimal volume dV, scalar quantity equal to the mass dm within the domain divided by the volume dV, thus ρ = dm/dV
  • derived quantity ISQ
tihedus preferred
Usage examples
  • Tihedus on füüsikaline suurus, mis näitab aine massi ruumalaühikus.
  • Materjali tihedus on muutuv sõltuvalt temperatuurist ja rõhust ning see muutus on tavaliselt väike tahkete ainete ja vedelike puhul, kuid palju suurem gaaside puhul; ka objekti rõhu suurendamine vähendab objekti mahtu ja suurendab seega selle tihedust ning aine temperatuuri tõstmine (mõne erandiga) vähendab selle tihedust, suurendades selle mahtu.
ρ symbol
Usage examples
  • Tiheduse tavatähis on väike kaldtäht ρ ja mõõtühik SI-s on kilogramm kuupmeetri kohta (kg/m3).
erikaal former
mahukaal deprecated
density preferred
Usage examples
  • The density of a material varies with temperature and pressure, and this variation is typically small for solids and liquids but much greater for gases. Increasing the pressure on an object decreases the volume of the object and thus increases its density, and increasing the temperature of a substance (with a few exceptions) decreases its density by increasing its volume.
mass density
volumetric mass density
volumic mass
ρ symbol
Usage examples
  • The standard symbol for density is the lowercase italic letter ρ, and the SI unit is the kilogram per cubic meter (kg/m³).
specific mass variant
weight density former
unit weight former
volumetric weight deprecated

Metroloogia terminibaas

ID 1142694 Last modified 21.05.2026
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Domain Standardisation - Metrology
gaasitihedus
gaasi tihedus
density of gas
  • gaasi massi ja ruumala jagatis
  • mass of gas divided by the volume
gaasitihedus
Usage examples
  • Gaasitihedus sõltub selle gaasi molaarmassist ja selle arvutamine hõlmab tavaliselt tiheduse valemi (mass jagatud ruumalaga) ja ideaalse gaasi seaduse (PV = nRT) kombineerimist.
gaasi tihedus
ρ symbol
density of gas
Usage examples
  • The density of a particular gas is dependent on its molar mass.
ρ symbol

Metroloogia terminibaas

ID 1187817 Last modified 28.09.2026
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Domain Standardisation - Metrologyunits of measurement
elektrilaengu ruumtihedus
laengu ruumtihedus
volume electric charge density
volume charge density
  • elektrilaengu jaotust kindlale ruumalale iseloomustav mõõtesuurus
Good to know
  • measure of how much electric charge is distributed over a specific volume
elektrilaengu ruumtihedus
Usage examples
  • Elektrilaengu ruumtihedus, tähis ρ, on laeng ruumalaühiku kohta (ρ = Q/V); kolmemõõtmeliste objektide puhul mõõdetakse seda kulonites kuupmeetri kohta (C/m³).
laengu ruumtihedus
ρ symbol
volume electric charge density
Usage examples
  • Volume electric charge density, symbol ρ, is charge per unit volume (ρ = Q/V), measured in coulombs per cubic meter (C/m3) for 3D objects.
volume charge density
ρ symbol

Word forms

Harilikult jääb tekstis käänamata. Vt lähemalt EKI teatmikus "Lühendite ja tähiste muutevormide esitus EKI ühendsõnastikus".

ρ

Etymology not available

Related words not available

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