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specific gravity
This term is a technical measurement used primarily in physics, chemistry, and geology to identify substances or determine the purity of a sample. Because it is a ratio of densities, the resulting value is a dimensionless number, meaning it has no unit of measurement like grams or liters.
In practical application, it is frequently used in medicine to analyze urine concentration or in brewing to monitor fermentation. It should not be confused with absolute density, as specific gravity specifically compares a material to a reference substance, typically water at 4 degrees Celsius.
Meanings
Examples
The lab technician measured the specific gravity of the urine sample.
We need to calculate the specific gravity of this alloy before casting.
Does the specific gravity of the coolant change as it heats up?
The specific gravity of seawater is slightly higher than that of pure water.
I wonder if the specific gravity of this mysterious liquid is higher than mercury.
Check the specific gravity of the battery acid using the hydrometer.
The professor explained how specific gravity helps identify unknown minerals.
A high specific gravity indicates a more concentrated solution.