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  1. 密度 - 维基百科,自由的百科全书

  2. Relative density - Wikipedia

  3. Density - Simple English Wikipedia, the free encyclopedia

  4. 能量密度 - 维基百科,自由的百科全书

  5. Density of air - Wikipedia

    The density of air or atmospheric density, denoted ρ, is the mass per unit volume of Earth's atmosphere. Air density, like air pressure, decreases with increasing altitude. It also changes with variations in atmospheric pressure, temperature …

  6. Density | Brilliant Math & Science Wiki

    Density is an intensive property, which means the density does not change as the amount of the substance present changes. This contrasts with mass (an extensive property), which appears quite often in physics, but becomes …

  7. Density | Definition, Symbol, Units, Formula, & Facts | Britannica

  8. 1.5: Density - Chemistry LibreTexts

  9. Population density - Wikipedia

    Population density (in agriculture: standing stock or plant density) is a measurement of population per unit land area. It is mostly applied to humans, but sometimes to other living organisms too. It is a key geographical term. [1] …

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