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Everything about Relative density
Ratio of two densities
Relative density, also called specific gravity, is a dimensionless quantity defined as the ratio of the density of a substance to the density of a given reference material. The relative density of solids and liquids is nearly always measured with respect to water at its densest ; for gases, the reference is air at room temperature. The term "relative density" is preferred modern use, for example in ISO, IUPAC, and NIST, while the term "specific gravity" is gradually being abandoned. Wikipedia →
🧭 Start here: a 6-step reading path
- Read the overview: Relative densityA 5-minute orientation
- Skim a recent paper: Global trends in grassland carrying capacity and relative stocking density of livestockInfluential work since 2022
- Pick up a classic book: Physics for scientists and engineersThe most-reprinted book on the subject
- Read the landmark paper: Development of the Colle-Salvetti correlation-energy formula into a functional of the electron densityCited 97,712 times
- Go sideways: DensityA closely related topic
- Go sideways: Particle mass densityA closely related topic
📖 Definitions
Noun A dimensionless measure which is the ratio of the mass of a substance to that of some reference substance (chiefly an equal volume of water at 4°C).
🗂️ The subject at a glance
🏆 Landmark papers (most cited)
Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density
Accurate spin-dependent electron liquid correlation energies for local spin density calculations: a critical analysis
Density-functional approximation for the correlation energy of the inhomogeneous electron gas
Results obtained with the correlation energy density functionals of becke and Lee, Yang and Parr
🆕 Influential since 2022
Global trends in grassland carrying capacity and relative stocking density of livestock
MDBSCAN: A multi-density DBSCAN based on relative density
Grid hollow octet truss lattices that are stable at low relative density
Revisiting interpretation of relative density from shallow depth CPTs in sand
Investigating relative density effects on quasi-static response of high-density Rigid Polyurethane Foam (RPUF)
📚 Books worth reading
Physics for scientists and engineersPaul A. Tipler, Gene Mosca · 1990- 📕Theory of DensityMohammad Javanshiry · 2017
- 📕Measurement assurance program for the spectral density of relative intensity noise of optical fiber sources near 1550 nmGregory E. Obarski · 2000
- 📕Relative densityColin D. MacLean · 1979
Cosmological special relativityMoshe Carmeli · 1997
Relativity in Curved SpacetimeEric Baird · 2007
Petroleum Measurement Tables : Volume Correction Factors. Volume VASTM, API, IP · 1992- 📕Evaluation of relative density and its role in geotechnical projects involving cohesionless soilsE. T. Selig · 1973
Ranked by number of editions on Open Library, a rough measure of how lasting a book is.
🔗 Related topics
- Density Density (volumetric mass density or specific mass) is the ratio of a substance's mass to its volume. The symbol most often used for density is ρ (the lower…
- Particle mass density The particle mass density or particle density of a material (such as particulate solid or powder) is the mass density of the particles that make up the…
- API gravity The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water: if its API gravity…
- Gravity (alcoholic beverage) Gravity, in the context of fermenting alcoholic beverages, refers to the specific gravity (abbreviated SG), or relative density compared to water, of the…
- Brix Degrees Brix (symbol °Bx) is a measure of the dissolved solids in a liquid, based on its specific gravity, and is commonly used to measure dissolved sugar…
- Hydrometer A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy. They are typically…
- List of measuring instruments A measuring instrument is a device to measure a physical quantity. In the physical sciences, quality assurance, and engineering, measurement is the activity…
- Buoyancy Buoyancy (/ˈbɔɪənsi, ˈbuːjənsi/), or upthrust, is the force exerted by a fluid opposing the weight of a partially or fully immersed object (which may also…