Relative density, or specific gravity, is the ratio of the density ( mass of a unit volume ) of a substance to the density of a given reference material.

Relative density with respect to air can be obtained by

Relative density can also help quantify the buoyancy of a substance in a fluid, or determine the density of an unknown substance from the known density of another.

Relative density is often used by geologists and mineralogists to help determine the mineral content of a rock or other sample.

Relative density can be calculated directly by measuring the density of a sample and dividing it by the ( known ) density of the reference substance.

Relative density is more easily and perhaps more accurately measured without measuring volume.

Relative density ( with respect to water ) can then be calculated using the following formula:

( See also Relative density and hydrometers.

# REDIRECT Relative density

* Relative density or specific gravity, a measure of density in comparison to the density of something else

* Relative density is about 0. 97

# redirect Relative density

Relative concentrations could signify a reflection of different postsynaptic elements in the neuropil or show that axons sought out and formed synapses only with specific postsynaptic elements.

Relative permeability, sometimes denoted by the symbol μ < sub > r </ sub >, is the ratio of the permeability of a specific medium to the permeability of free space, μ < sub > 0 </ sub >:

* Relative direction, where down is the direction towards the centre of gravity of a celestial object.

Relative gravimeters compare the value of gravity at one point with another.

DeWitt's phrase " many-worlds " has become so much more popular than Everett's " Universal Wavefunction " or Everett-Wheeler's " Relative State Formulation " that many forget that this is only a difference of terminology ; the content of both of Everett's papers and DeWitt's popular article is the same.

Relative value is often used as a synonym for market neutral, as strategies in this category typically have very little or no directional market exposure to the market as a whole.

Relative knot strength, also called knot efficiency, is the breaking strength of a knotted rope in proportion to the breaking strength of the rope without the knot.

" cn = John Doe " is the entry's RDN ( Relative Distinguished Name ), and " dc = example, dc = com " is the DN of the parent entry, where " dc " denotes ' Domain Component '.

Relative humidity in Nashville averages 83 % in the mornings and 60 % in the afternoons, which is considered moderate for the Southeastern United States.

REBOL ( ; Relative Expression Based Object Language ) is a cross-platform data exchange language and a multi-paradigm dynamic programming language originally designed by Carl Sassenrath for network communications and distributed computing.

Relative velocity is the motion of an object from the point of view of an observer in a frame of reference.

The TARDIS ( ( Time and Relative Dimension in Space ) is a time machine and spacecraft in the British science fiction television program Doctor Who and its associated spin-offs.

The rotor rotates at velocity U. Relative to the rotor, the velocity of the gas as it impinges on the rotor entrance is V < sub > r1 </ sub >.

They worshipped and made incantations to their Nae Yakka ( Relative Spirit ) followed by other customary ritual ( called the Kiri Koraha ) which is still in vogue among the surviving Gam Veddas of Rathugala, Pollebedda Dambana and the Henanigala Vedda re-settlement ( in Mahaweli systems off Mahiyangane ).

Relative accuracy is the error of the measurement compared to the device used to calibrate the multimeter.

( Tony Rothman in Everything's Relative and Other Fables from Science and Technology argues that there is no clear evidence that Young actually did the two-slit experiment.

Relative humidity is a term used to describe the amount of water vapor in a mixture of air and water vapor.

Relative humidity is normally expressed as a percentage and is calculated by using the following equation, it is defined as the ratio of the partial pressure of water vapor ( H < sub > 2 </ sub > O ) in the mixture to the saturated vapor pressure of water at a prescribed temperature.

Relative humidity is an important metric used in weather forecasts and reports, as it is an indicator of the likelihood of precipitation, dew, or fog.

Relative atomic mass ( symbol: A ) is a dimensionless physical quantity, the ratio of the average mass of atoms of an element ( from a given source ) to 1 / 12 of the mass of an atom of carbon-12 ( known as the unified atomic mass unit ).

Relative humidity, also called humidity ratio, is classified in three ways:

Relative advantage simply meant that the ratio of the labor embodied in the two commodities differed between two countries, such that each country would have at least one commoditiy where the relative amount of labor embodied would be less than that of the other country.

* Relative Price is a ratio.

* Relative risk ratio

* Relative humidity ( RH ) is the ratio of the mole fraction of water vapor to the mole fraction of saturated moist air at the same temperature and pressure.

Relative risk is a ratio of the probability of the event occurring in the exposed group versus a non-exposed group.

The International Committee of the Red Cross 1958 Commentary on 1949 Geneva Convention IV Relative to the Protection of Civilian Persons in Time of War states: " Every person in enemy hands must have some status under international law: he is either a prisoner of war and, as such, covered by the Third Convention, a civilian covered by the Fourth Convention, or again, a member of the medical personnel of the armed forces who is covered by the First Convention.

Relative clauses may be either finite clauses ( as in the examples above ) or non-finite clauses.

In 1815, he published Mémoire sur les masses relatives des molécules des corps simples, ou densités présumées de leur gaz, et sur la constitution de quelques-uns de leur composés, pour servir de suite à l ' Essai sur le même sujet, publié dans le Journal de Physique, juillet 1811 (" Note on the Relative Masses of Elementary Molecules, or Suggested Densities of Their Gases, and on the Constituents of Some of Their Compounds, As a Follow-up to the Essay on the Same Subject, Published in the Journal of Physics, July 1811 ") (), about gas densities.

Relative thermal resistance is a measure of the energy required to mix water of two different temperatures ( and thus different densities ).

Relative surface densities of cranial bone in Stegoceras validum ( UA 2 ).