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peso específico

English translation: specific gravity

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
Spanish term or phrase:peso específico
English translation:specific gravity
Entered by: DR. RICHARD BAVRY
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16:18 Jul 22, 2001
Spanish to English translations [PRO]
Tech/Engineering
Spanish term or phrase: peso específico
chemicals
Mikel Cimarro
specific gravity
Explanation:
This is the phrase most often used in the scientific literature.

Google hits for "specific gravity" = 171,000
Google hits for "specific weight" = 31,700

For example, see:

http://antoine.fsu.umd.edu/chem/senese/101/measurement/faq/s...

What is specific gravity?

I am trying to determine the specific gravity of polychlorinated biphenyl (PCB). The only information I have is the mass (or volume) of the compound and the molecular weight. What other information do I need to determine the specific gravity?
Jason Eardley

Vocabulary
density
specific gravity

Specific gravity is the density of a substance relative to some reference substance:
Specific gravity = density of substance
density of reference substance


Specific gravity was defined because it's convenient to have a unitless measure of density. The reference substance for solids and liquids is usually water at 4°C. At that temperature, water has a density of 1.0000 g/mL. So if you know the density of a substance in g/mL, for most practical purposes that's numerically equal to the specific gravity.

To find the specific gravity of the PCB, then, you'll need to have the mass (in g) of a given volume (in mL) of PCB.

Author: Fred Senese senese@antoine.frostburg.edu


http://mineral.galleries.com/minerals/property/density.htm

Specific gravity is a measure of the density of a mineral. At times it is such a useful property that it is the only way to distinguish some minerals without laboratory or optical techniques. Gold (pictured) can easily be distinguished from "fool's gold" by specific gravity alone, although there are many other ways. 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. However, since water's density equals 1 gram per cubic centimeter (at specific conditions), then a mineral's specific gravity would also correspond to a mineral's density as expressed in grams per cubic centimeter.
Specific gravity, or SG, as already stated compares the density of a mineral to the density of water. If a mineral has a SG of 2, then it is twice as dense as water. If a mineral has a SG of 3 then it is three times as dense as water and so forth. However, comparing a mineral to water is not practical and is not really helpful. It is easier to consider what is the SG of a typical mineral and compare minerals that way.

Selected response from:

DR. RICHARD BAVRY
Grading comment
4 KudoZ points were awarded for this answer

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Summary of answers provided
na +4specific weight [or, gravity]
Terry Burgess
na +1[ADDENDUM]DR. RICHARD BAVRY
na +1specific gravityDR. RICHARD BAVRY


  

Answers


17 mins peer agreement (net): +4
specific weight [or, gravity]


Explanation:
Hope this helps:-)
terry

See:
http://eurodic.ip.lu:8086//cgi-bin/edicbin/expert.pl


    EurodicAutom...arriba
Terry Burgess
Mexico
Local time: 02:07
Native speaker of: Native in EnglishEnglish
PRO pts in pair: 2372

Peer comments on this answer (and responses from the answerer)
agree  Patricia Lutteral: gravity sí, weight no :-)
1 hr

agree  Fuad Yahya: agree with Patricia.
5 hrs

agree  Davorka Grgic: Weight and gravity force are the same thing.
9 hrs

agree  DR. RICHARD BAVRY: specific gravity si, specific weight no!
17 hrs
Login to enter a peer comment (or grade)

10 hrs peer agreement (net): +1
specific gravity


Explanation:
This is the phrase most often used in the scientific literature.

Google hits for "specific gravity" = 171,000
Google hits for "specific weight" = 31,700

For example, see:

http://antoine.fsu.umd.edu/chem/senese/101/measurement/faq/s...

What is specific gravity?

I am trying to determine the specific gravity of polychlorinated biphenyl (PCB). The only information I have is the mass (or volume) of the compound and the molecular weight. What other information do I need to determine the specific gravity?
Jason Eardley

Vocabulary
density
specific gravity

Specific gravity is the density of a substance relative to some reference substance:
Specific gravity = density of substance
density of reference substance


Specific gravity was defined because it's convenient to have a unitless measure of density. The reference substance for solids and liquids is usually water at 4°C. At that temperature, water has a density of 1.0000 g/mL. So if you know the density of a substance in g/mL, for most practical purposes that's numerically equal to the specific gravity.

To find the specific gravity of the PCB, then, you'll need to have the mass (in g) of a given volume (in mL) of PCB.

Author: Fred Senese senese@antoine.frostburg.edu


http://mineral.galleries.com/minerals/property/density.htm

Specific gravity is a measure of the density of a mineral. At times it is such a useful property that it is the only way to distinguish some minerals without laboratory or optical techniques. Gold (pictured) can easily be distinguished from "fool's gold" by specific gravity alone, although there are many other ways. 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. However, since water's density equals 1 gram per cubic centimeter (at specific conditions), then a mineral's specific gravity would also correspond to a mineral's density as expressed in grams per cubic centimeter.
Specific gravity, or SG, as already stated compares the density of a mineral to the density of water. If a mineral has a SG of 2, then it is twice as dense as water. If a mineral has a SG of 3 then it is three times as dense as water and so forth. However, comparing a mineral to water is not practical and is not really helpful. It is easier to consider what is the SG of a typical mineral and compare minerals that way.




    see above
    organic chemist (Ph.D) for 30 years
DR. RICHARD BAVRY
PRO pts in pair: 94

Peer comments on this answer (and responses from the answerer)
agree  Cecilia Castro de Anderson
7 hrs
  -> ¡Gracias!
Login to enter a peer comment (or grade)

10 hrs peer agreement (net): +1
[ADDENDUM]


Explanation:
Should be: Specific gravity = density of substance/density of reference substance (for some reason the "/" was not reproduced when I pasted the text)



    .
DR. RICHARD BAVRY
PRO pts in pair: 94

Peer comments on this answer (and responses from the answerer)
agree  Denali: density is more appropriate when you talk about chemicals
1 day 7 hrs
Login to enter a peer comment (or grade)




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