Why is specific gravity a unitless quantity?
Answers
Explanation:
Specific gravity is a dimensionless quantity; that is, it is not expressed in units. ... Materials with a specific gravity less than 1 are less dense than water, and will float on the pure liquid; substances with a specific gravity more than 1 are more dense than water, and will sink.
Answer:
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Explanation:
Specific Gravity
Specific gravity of a substance a comparison of the density of a substance relative to a standard value. Scientists express specific gravity of liquids and solids using water at 4oC as the standard.
In calculating the specific gravity of a substance, the density of the substance and the density of water are expressed in the same units. This leaves specific gravity unitless.
The density of water at 4oC is 1.00 g/mL. Therefore, the density of solids or liquids expressed as g/mL is numerically equal to their specific gravities.
The notation of expressing specific gravity is given below. Place your mouse over the image to get a brief explanation of the notation.