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2. Area density - Wikipedia

   en.wikipedia.org/wiki/Area_density

   A special type of area density is called column density (also columnar mass density or simply column density), denoted ρ A or σ. It is the mass of substance per unit area integrated along a path; [ 1 ] It is obtained integrating volumetric density ρ {\displaystyle \rho } over a column: [ 2 ] σ = ∫ ρ d s . {\displaystyle \sigma =\int \rho ...

3. Column density - Wikipedia

   en.wikipedia.org/?title=Column_density&redirect=no

   Column density. 5 languages. ... Print/export Download as PDF; Printable version; In other projects Wikiversity; Wikidata item; Appearance ...

4. Densities of the elements (data page) - Wikipedia

   en.wikipedia.org/wiki/Densities_of_the_elements...

   New York: The International Nickel Company, Inc., 1941: 16. — "Values ranging from 21.3 to 21.5 gm/cm 3 at 20 °C have been reported for the density of annealed platinum; the best value being about 21.45 gm/cm 3 at 20 °C." 21.46 g/cm 3 — Rose, T. Kirke. The Precious Metals, Comprising Gold, Silver and Platinum. New York: D. Van Nostrand ...

5. Number density - Wikipedia

   en.wikipedia.org/wiki/Number_density

   Column number density is a kind of areal density, the number or count of a substance per unit area, obtained integrating volumetric number density along a vertical path: ′ =. It's related to column mass density , with the volumetric number density replaced by the volume mass density.

6. Water (data page) - Wikipedia

   en.wikipedia.org/wiki/Water_(data_page)

   The third column is the heat content of each gram of the liquid phase relative to water at 0 °C. The fourth column is the heat of vaporization of each gram of liquid that changes to vapor. The fifth column is the work PΔV done by each gram of liquid that changes to vapor. The sixth column is the density of the vapor.

7. Grammage - Wikipedia

   en.wikipedia.org/wiki/Grammage

   The basis weight of paper is the density of paper expressed in terms of the mass of a ream of given dimensions and a sheet count. In the US system, the weight is specified in avoirdupois pounds and the sheet count of a paper ream is usually 500 sheets. However, the mass specified is not the mass of the ream that is sold to the customer.

8. List of boiling and freezing information of solvents - Wikipedia

   en.wikipedia.org/wiki/List_of_boiling_and...

   This Wikipedia page provides a comprehensive list of boiling and freezing points for various solvents.

9. Dobson unit - Wikipedia

   en.wikipedia.org/wiki/Dobson_unit

   The Dobson unit (DU) is a unit of measurement of the amount of a trace gas in a vertical column through the Earth's atmosphere.It originated by, and continues to be primarily used in respect to, the study of atmospheric ozone, whose total column amount, usually termed "total ozone", and sometimes "column abundance", is dominated by the high concentrations of ozone in the stratospheric ozone layer.