Is volume and density the same?

Answer 1

Specific gravity and density will have the same value when the two substances under investigation have identical densities. Let's look at this. Density is an expression of the amount of mass per unit of volume that a substance exhibits. Liquid water has a maximum density at about 4 °C. And there is 1 gram in a cubic centimeter or a milliliter of water. We say water has a density of 1 gram/cubic centimeter. Other substances can have their mass discovered when a known volume is weighed, and then the density of those substances can be discovered and recorded. Specific gravity is a comparison of the density of a substance to the density of water. The specific gravity of a material will not have units associated with it. It is a purenumber. If a substance has a spee gee (lab speak for specific gravity) of 2, it will have 2 times the density of water. A cubic centimeter of this material will weigh 2grams, and will have a density of 2 grams per cubic centimeter. But, to repeat, spee gee has no units associated with it. The only time that specific gravity and density will have the same value is when the substance under inspection has the same density of water at 4 °C. That's the only time density and spee gee will have the same value. And note that we're talking value here, and without regard to units. Density has units of mass per unit of volume, and specific gravity has only a numerical value, only magnitude, and nounits associated with it.

Answer 2

Density is expressed in Mg/m3 (or g/cm3).

Specific gravity is relative, has not unit: this is the ratio density of a liquid/density of water at a given temperature.

Answer 3

Density: mass / volume

Specific gravity: density, compared to the density of water. That is, divide the density by the density of water.

For example, in SI units, iron has a density of about 7900 (kilograms / cubic meter meter, and (since water has a density of 1000), a specific gravity of 7.9.

Answer 4

Specific gravity and density are not the same. Density is given as mass divided by volume, and specific gravity is a ratio of the density of a substance to the density of water.

Answer 5

Specific gravity is defined as the density of a substance, divided by the density of water.

Answer 6

Density is the weight per unit volume at the same temperature, where as the specific gravity is the weight of same volume of water at the same temperature.

Answer 7

No, imagine an equal sized block of steel, and of Styrofoam. They are both the same size, so they have the same volume, but the steel block has a higher density so it's heavier.

Answer 8

w = m * g

similarly,

density = specific gravity * g

where, g = 9.81 m/sec2