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Topic: Specific gravity


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In the News (Mon 17 Jun 19)

  
 specific gravity. The Columbia Encyclopedia, Sixth Edition. 2001-05
Similarly, if the specific gravity of a substance is known and the density of the reference substance is known in some particular units, then the density of the substance of interest, in those units, is equal to the product of its specific gravity and the density of the reference substance.
The specific gravity of the solid is the ratio of its weight in air to the difference between its weight in air and its weight immersed in water.
Specific gravities of gases are usually converted mathematically to their value at standard temperature and pressure (see STP).
www.bartleby.com /65/sp/specgrav.html   (575 words)

  
 BT - Understanding Specific Gravity and Extract
Specific gravity is the density (weight per unit volume) of a substance divided by the density of water.
The specific gravity of liquids is often measured with a hydrometer, whose weight (a constant) displaces different volumes of liquid as the liquid's density varies.
Change in specific gravity with dilution or evaporation: As the volume of a wort is increased by dilution or decreased by evaporation, the weight of extract within it remains constant.
www.brewingtechniques.com /library/backissues/issue1.3/manning.html   (2204 words)

  
 specific gravity --  Encyclopædia Britannica   (Site not responding. Last check: 2007-10-22)
Specific gravity (G) is defined as the ratio between the weight of a substance and the weight of an equal volume of water at 4° C. Thus a mineral with a specific gravity of 2 weighs twice as much as the same volume of water.
Specific gravity is a related quantity that is defined as the ratio of the density of the analyte to the density of water at a specified temperature.
In the metric system of measurement, density and specific gravity are numerically identical; for example, the average density of the wood of Douglas fir is 0.45 gram per cc, and its specific gravity 0.45, because 1 cc of water weighs 1 gram.
www.britannica.com /eb/article-9069028?&query=specific   (1012 words)

  
 Urine specific gravity   (Site not responding. Last check: 2007-10-22)
Specific gravity measures the kidney's ability to concentrate or dilute urine in relation to plasma.
In infants, the range for specific gravity is less because immature kidneys are not able to concentrate urine as effectively as mature kidneys.
It is important for nurses to consider this type of fluid retention and related increase in urine specific gravity in the immediate post-operative patient to avoid excessive fluid replacement.
www.rnceus.com /ua/uasg.html   (471 words)

  
 MINERAL GALLERY - SPECIFIC GRAVITY
Specific gravity is a measure of the density of a mineral.
Specific gravity is a unitless measure, because it is derived from the density of the mineral divided by the density of water and thus all units cancel.
To use specific gravity, hold a mineral of unknown SG in one hand and in the other hand a mineral of known SG preferably one near the average of 2.75 and of the same size as the unknown mineral; then compare.
mineral.galleries.com /minerals/density.htm   (596 words)

  
 ATJ's Marine Aquarium Site - Reference - Specific Gravity
Specific gravity is used by aquarists to estimate the salinity of the water in their aquaria.
Specific gravity is defined as the ratio of the density of a sample (at a specific temperature) to the density of some standard (at a specific temperature).
Before outlining the correct specific gravity of water for a reef tank, it should be noted that we should be aiming for the correct salinity and the specific gravity is simply the method chosen to estimate the salinity.
www.petsforum.com /personal/trevor-jones/specificgravity.html   (3114 words)

  
 [Ganoksin] Jewelry Making - Notes On Specific Gravity
Specific gravity is then defined as "The weight of a body compared with the weight of an equal amount of pure water at 4
The specific gravity for each mineral is the same within narrow limits (except in species like topaz or garnet and zircon where subgroups with definite specific gravities occur).
In practice however because of time constraints and other factors specific gravity determination is usually used as a corroborative test or for large, rough or carved samples.
www.ganoksin.com /borisat/nenam/gravity.htm   (1953 words)

  
 Density   (Site not responding. Last check: 2007-10-22)
Specific gravity is also a measurement of heaviness.
To determine a specific gravity number you compare the density of a substance to that of an equal volume of fresh water.
In the pump business we assume the pump to be pumping cold fresh water so specific gravity is a useful term, but of the two methods of describing "heaviness", density makes the most sense.
www.mcnallyinstitute.com /16-html/16-02.htm   (526 words)

  
 Measuring Specific Gravity   (Site not responding. Last check: 2007-10-22)
A hydrometer float inserted in a glass-barreled, rubber bulb syringe is used to measure the specific gravity of electrolyte.
The float is graduated in points of specific gravity, wherein 0.001 equals one point of specific gravity.
The specific gravity is read on the hydrometer scale at the level at which it floats in the electrolyte.
cdtechno.com /cd/library/manual/f6741/Measuring_Specific_Gravity.htm   (692 words)

  
 Specific Gravity   (Site not responding. Last check: 2007-10-22)
The specific gravity of a substance is a comparison of its density to that of water.
To compare the specific gravity of any two minerals, simply hold a sample of one in your hand and "heft it," i.e., get a feeling for its weight.
It is often sufficient to note whether a mineral's specific gravity is significantly higher or lower than that of other minerals.
geology.csupomona.edu /alert/mineral/gravity.htm   (174 words)

  
 Specific Gravity
In this case, the specific gravity of the pumpage can be estimated based on the amount of solids by weight and by volume in the pumpage.
Specific gravity is defined as the density of a given liquid divided by the density of water.
The specific gravity of cooking oil is.92 and the specific gravity of ammonia is.662.
www.pumpfile.com /html/specific_gravity.html   (197 words)

  
 The MSDS HyperGlossary: Density
Specific gravity is a ratio of the mass of a material to the mass of an equal volume of water at 4
The density or specific gravity can be handy if we know the mass of material that was shipped to us but we need to know the volume...or vice-versa.
The depth to which the hydrometer sinks is inversely proportional to the specific gravity of the liquid.
www.ilpi.com /msds/ref/density.html   (779 words)

  
 Medical Tests - Urine specific gravity - Detroit, Michigan   (Site not responding. Last check: 2007-10-22)
This test measures the specific gravity of the urine, which is a reflection of the concentration of particles in the urine (see also urine concentration test).
Osmolality is a more exact measurement of urine concentration than specific gravity because specific gravity depends on the precise nature of the molecules present in the urine.
Specific gravity also requires correction for the presence of glucose or protein.
www.henryfordhealth.org /14506.cfm   (526 words)

  
 EGG SPECIFIC GRAVITY   (Site not responding. Last check: 2007-10-22)
Determining an eggs specific gravity is accomplished by the flotation of the egg in various salt solutions.
Specific gravity is the ratio of the weight of an object to the weight of an equal volume of water.
Specific gravity of an egg indicates the quantity of shell relative to other components of the egg.
www.afn.org /~poultry/flkman5.htm   (1628 words)

  
 Specific Gravity
The most accurate and direct way to test the state of charge of a battery cell is to determine the specific gravity of the battery electrolyte.
The higher the specific gravity of the electrolyte the higher the state of charge.
The metric units must be used to convert to the specific gravity scale based on water.
www.thesolar.biz /Measuring_specific_gravity_article.htm   (543 words)

  
 Metric Density and Specific Gravity   (Site not responding. Last check: 2007-10-22)
Specific gravity is the heaviness of a substance compared to that of water, and it is expressed without units.
In the metric system specific gravity is the same as in the British system.
If something is 7.85 times as heavy as an equal volume of water (such as iron is) its specific gravity is 7.85.
www.essex1.com /people/speer/density.html   (390 words)

  
 New Page 1   (Site not responding. Last check: 2007-10-22)
It is common knowledge that the specific gravity of electrolyte in a battery is not only affected by charge level, but also by temperature.
These changes in specific gravity does not mean that the battery charge level is increasing or decreasing, it simply means that the temperature of the battery is changing.
This means that as the specific gravity of the electrolyte changes due to temperature fluctuations, the specific gravity of the ball floats also changes to compensate.
www.itwdelpro.com /temp_comp.html   (211 words)

  
 Lab Safety Supply - EZ Facts Safety Info - Document #117, Hydrometers
A hydrometer is an instrument that is used to determine specific gravity.
The standard hydrometer scale is known as the specific gravity scale in which distilled water equals 1.000, the initial point of measurement.
The specific gravity of the sample liquid is indicated when the level of the sample liquid in the jar aligns with a point on the the hydrometer scale.
www.labsafety.com /refinfo/ezfacts/ezf117.htm   (844 words)

  
 Randy Holmes-Farley - Chemistry In The Aquarium
For example, the specific gravity of natural seawater (S =35) is 1.0278 using the 3.98 °C standard, 1.0269 using the 60 °F standard, 1.0266 using the 20 °C standard, and 1.0264 using the 77 °F standard.
Unfortunately, unless you have a table for your specific hydrometer (which is rarely supplied), this effect cannot be corrected by a table because of the different materials of construction of hydrometers.
Similarly, a specific gravity of 1.023 corresponds to a salinity of 30 ± 0.7.
www.advancedaquarist.com /issues/jan2002/chemistry.htm   (2841 words)

  
 Specific Gravity
The term specific gravity is used to describe the weight or density of a liquid compared to an equal volume of fresh water at 4°C (39° F).
It is important that you do not confuse specific gravity with viscosity which is a measurement of a fluids resistance to pouring.
= Specific gravity of the mixture or slurry
www.mcnallyinstitute.com /07-html/7-12.html   (618 words)

  
 Hobbyist's Corner
Now we're asking you to change the term to specific gravity, or the density of salt water compared to that of pure fresh water.
Specific gravity is measured with a hydrometer, and is directly affected by water temperature.
This is because at a lower specific gravity fish metabolism will slow, allowing easier excretion of soluble wastes, and permitting a higher oxygen concentration.
www.fishmartinc.com /hc-specgravity.htm   (265 words)

  
 Specific Gravity (Units)
Displays a view to convert between standard specific gravity units and degrees Plato.
Specific Gravity - The gravity as measured relative to the density of water (unitless).
Water has a specific gravity of 1.000, and most beers have a starting gravity in the range of 1.025-1.100.
www.beersmith.com /Help/specific_gravity_units.htm   (168 words)

  
 Carat Weight and Specific Gravity - Gem basic concept   (Site not responding. Last check: 2007-10-22)
Specific Gravity is a scientific term that expresses the density of a material.
That is right, a higher specific gravity will mean the same carat weight gem is smaller in size.
One very important example is a diamond (specific gravity 3.52) and a cubic zirconia (specific gravity 5.80).
www.which-diamonds.com /gemcw.html   (195 words)

  
 Relative density - Wikipedia, the free encyclopedia
Relative density (also known as specific gravity) is a measure of the density of a material.
The relative density therefore has nearly the same value as density of the material expressed in grams per cubic centimetre, but without any units of measurement.
Relative density or specific gravity are often ambiguous terms.
en.wikipedia.org /wiki/specific_gravity   (564 words)

  
 Mineral Properties: Specific Gravity
The specific gravity value is expressed upon how much greater the weight of the mineral is to an equal amount of water.
Minerals with a specific gravity under 2 are considered light, between 2 and 4.5 average, and greater than 4.5 heavy.
The specific gravity may slightly vary within a mineral because of impurities present in the minerals structure.
www.minerals.net /resource/property/sg.htm   (475 words)

  
 MMS - Understanding Specific Gravity
Specific gravity can be defined as 1 fluid ounce of product has a weight of (insert numbers here) ounces.
Water has a specific gravity of 1 which means 1 fluid ounce weighs 1 ounce.
Glycerin has a specific gravity of 1.21 which means 1 fluid ounce weighs 1.21 ounces.
www.the-sage.com /calcs/specificgravity.html   (493 words)

  
 YourGemologist: A Study of Specific Gravity
Specific gravity of a material is based on its density.
What we have done is to raise the specific gravity of the water to a level above the specific gravity of the amber.
Now you know why gemstones have different specific gravities, and why the SG test is important for gemstone identification.
www.yourgemologist.com /SpecificGravity/specificgravity.html   (595 words)

  
 Specific gravity   (Site not responding. Last check: 2007-10-22)
The single most important screening test for renal insufficiency is urine specific gravity, which can be measured using an hydrometer or refractometer.
A pale coloured urine with a low specific gravity indicates increased water excretion (polyuria) and is seen in many of the clinical conditions which are common in older cats and dogs, e.g.
A high urine specific gravity indicates urine concentration and may be caused by decreased renal perfusion as in shock, dehydration or cardiac disease.
www.provet.co.uk /geriatrics/5a66340.htm   (98 words)

  
 Density   (Site not responding. Last check: 2007-10-22)
The figure quoted is often the same as that for specific gravity.
Specific gravity is defined in Webster's dictionary as the ratio of the weight or mass of a given volume of a substance to that of another substance (usually water for solids and liquids) used as a standard.
Specific gravity is not expressed in units as it is purely a ratio.
www.24carat.co.uk /densityorspecificgravity.html   (184 words)

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