What does the term specific gravity mean?
What does the term specific gravity mean?
relative density
specific gravity, also called relative density, ratio of the density of a substance to that of a standard substance. Because it is the ratio of two quantities that have the same dimensions (mass per unit volume), specific gravity has no dimension.
Who came up with specific gravity?
The discovery of specific gravity makes for an interesting story. Sometime around 250 B.C., the Greek mathematician Archimedes was given the task of determining whether a craftsman had defrauded King Heiro II of Syracuse.
What is the difference between gravity and specific gravity?
The ratio of mass per unit volume is known as the density of a liquid. On the other hand, specific gravity refers to the relative density of a fluid with respect to another liquid (usually water)….Difference Between Density and Specific Gravity.
| Density | Specific Gravity |
|---|---|
| The dimensional formula of density is [M L-3]. | It is a dimensionless quantity. |
Why specific gravity is important?
Why Specific Gravity is Important In applications with higher specific gravity, more torque would be required to produce the desired result. If specific gravity was not taken into consideration, and a mixer not optimized accordingly, results would be unpredictable, and motor damage and/or failure would likely occur.
Is specific gravity the same as density?
Density is defined as mass per unit volume. It has the SI unit kg m-3 or kg/m3 and is an absolute quantity. Specific gravity is the ratio of a material’s density with that of water at 4 °C (where it is most dense and is taken to have the value 999.974 kg m-3).
Why does specific gravity have no units?
Specific gravity has no units because all the units cancel out in its formula. The formula for the specific gravity of an object is its density…
Is specific gravity constant?
Because the density is directly related to the mass, the specific gravity can also be determined from the ratios of the mass of the object to the mass of the water, or the ratios of the weight of the object to the weight of water. The specific gravity has no units.
What is the SG of alcohol?
For example the starting specific gravity for an average ale or lager will be in the range 1.038-1.050 and for a wine, around 1.075-1.095. This reading is termed the original gravity, or OG. When the beer is undergoing fermentation the sugars in the liquid are converted by the yeast into alcohol and carbon dioxide.