alleryStart learning →Specific gravity is defined as the ratio of an object's density to the density of:
AMercury at zero degrees
BIce at zero degrees
CWater at four degrees
DAir at sea level
Answer & Solution
Correct answer: C. Water at four degrees
1. Specific gravity is a comparison, so it needs a reference fluid.
2. It is useful to define the ratio of the density of an object to a fluid, usually water.
3. That ratio is called specific gravity.
4. The reference is the density of water at 4.00 degrees Celsius.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 11 'Fluid Statics', sections 11.1-11.9_
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