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What is Specific Gravity?

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What is Specific Gravity?

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Specific gravity is a measure of the density of a mineral. At times it is such a useful property that it is the only way to distinguish some minerals without laboratory or optical techniques. Gold (pictured) can easily be distinguished from “fool’s gold” by specific gravity alone, although there are many other ways. Specific gravity is a unitless measure, because it is derived from the density of the mineral divided by the density of water and thus all units cancel. However, since water’s density equals 1 gram per cubic centimeter (at specific conditions), then a mineral’s specific gravity would also correspond to a mineral’s density as expressed in grams per cubic centimeter. Specific gravity, or SG, as already stated compares the density of a mineral to the density of water. If a mineral has a SG of 2, then it is twice as dense as water. If a mineral has a SG of 3 then it is three times as dense as water and so forth. However, comparing a mineral to water is not practical and is not

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Specific gravity is the ratio of the weight of a given substance to the weight of an equal volume of water at a specified temperature.

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Specific gravity is a special case of relative density. In this case the density of a substance is divided by the density of water at 4 F (0 C). Since water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is the same number as density but without any units (adimensional). Relative density is another adimensional number which measures density of any substance in relation to another. A relative density greater than one means that the substance in the numerator has a bigger density than the one in the denominator and vice versa. Applying the same concept to specific gravity: if the substance is not miscible with water (do not mix or dissolve) it will float for specific density over one and will sink for specific gravity under one. Density is the ratio between mass and volume. It reveals interesting features of a substance and is essentially related with the way the atoms and molecules in the substance are arranged. It will depend on the temperature among o

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Specific gravity is the ratio of the weight of an object to the weight of an equal volume of water. In other words, weigh the egg and then divide the weight by the volume of the egg. Specific gravity of an egg indicates the quantity of shell relative to other components of the egg. Egg specific gravity usually declines as the hen ages. This is partly due to the size of the egg increasing more rapidly than shell weight. Therefore, differences in specific gravity among eggs of similar weights are mainly due to variations in the amount of shell. One could also break the egg, wash away excess albumin from the shell, let the shell dry and then weigh the eggshell. However, this is destructive, losses of small pieces of eggshell occur, and requires more space and time. Specific gravity measurements in field situations can provide accurate results more rapidly. Also, when the eggshell is dry, thickness can be determined and used as a measure of eggshell quality. However, specific gravity and e

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