Specific Gravity
Reference from the original Physics I textbook.
- Specific Gravity
Explains the relationship between the density of an object and the density of water. If the SG > , then the object is more dense than water and will therefore sink. If SG < , the object will float.


- Related Glossary Terms
Specific Gravity (Submerged Volume) Approach, Specific Gravity Equation
- Index
Glossary and deeper reading · 1 refreshers
These editorial refreshers supplement the reading. Definitions and examples are added guidance; original source wording and recorded answers remain in their original context.
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Specific gravity
Specific gravity is a material’s density divided by a chosen reference density. It is dimensionless; for liquids and solids the reference is usually water at a specified temperature. For example, a liquid with specific gravity below one is less dense than the reference water.