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Encyclopedia

Knowledge card

Density units are kg m⁻³

The historical kg/m entry is dimensionally incorrect: mass density is mass per volume, [ρ] = M L⁻³, so its SI unit is kg m⁻³.

Dimension I

Definition

What it is — and what it is not

What it is
  • S1Correction and justification — The historical kg/m entry is dimensionally incorrect: mass density is mass per volume, [ρ] = M L⁻³, so its SI unit is kg m⁻³. [1.1]

Dimension II

In practice

How to deal with it

No practical guidance recorded yet.

Applies pattern

References

  1. BIPM SI Brochure, 9th edition (2019)

    • 1.1

      Table 5: density, mass density — The historical kg/m entry is dimensionally incorrect: mass density is mass per volume, [ρ] = M L⁻³, so its SI unit is kg m⁻³.

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