비중
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정의
어떤 물질의 밀도와 기준 물질(보통 4°C에서의 물, 999.97 kg/m³)의 밀도의 무차원 비.
설명
Gold has a specific gravity of 19.3, meaning it is 19.3 times denser than water. Ice has a specific gravity of 0.917, which explains why it floats (any value below 1.0 floats in water). Specific gravity equals density in g/cm³ for liquids and solids, since water’s density is approximately 1.000 g/cm³ at 4°C. Brewers use specific gravity (typically 1.040–1.060 for wort) to estimate alcohol content after fermentation.
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