Relative density in detail.
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Answer:
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Explanation:
Relative density => Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity usually means relative density with respect to water. The term "relative density" is often preferred in scientific usage.
=> Density v. Specific Gravity
Although the two terms often are used interchangeably, there is a technical difference between specific gravity and density. Density is defined as the mass per unit volume of a substance. Water has a density of 1 kg/l at 4°C. When the specific gravity is defined based on water at 4°C, then the specific gravity is equal to the density of the liquid. However, if the specific gravity is expressed at different temperatures, it will no longer be equal to the density. Although there is a difference between specific gravity and density, for the most part the values are similar enough to be used interchangeably in most situations.
=> Specific gravity is an important concept to know when mixtures of immiscible liquids, such as gasoline and water, are present. It is possible that the particular location of a liquid within a mixture is of interest in a case. Petroleum products, in general, have a low specific gravity, and will float on water. With an increasing number of carbons, the specific gravity of petroleum products increases. However, the specific gravity does not exceed one until products such as asphalt are considered.
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