Question #2a982

1 Answer
Dec 9, 2016

Answer:

Density is the only important ratio. (Mass/unit volume). The other usages sound book-specific to me.

Explanation:

Relative density – the density difference between two substances – is called specific gravity . Normally, water at the same temperature is the reference material.

“Normal” usually refers to common conditions, usually ambient temperatures pressures. Thus, the term “normal relative density” may refer to a specific gravity at room temperature and pressure.