Relationship between specific gravity and relative density units First question arises is what is density, Density is the mass of 1 ml of any substance (ignore SI unit). Now in fluid mechanics, specific gravity is defined as the. Relative density (also known as specific gravity) is a dimensionless ratio of the density is dimensionless, since it is a ratio between two quantities of same unit. Relative density is the ratio of the density of that substance to a . as specific weight, with a measurement unit of Newton per cubic meter.

Temperature dependence[ edit ] See Density for a table of the measured densities of water at various temperatures. The density of substances varies with temperature and pressure so that it is necessary to specify the temperatures and pressures at which the densities or masses were determined. It is nearly always the case that measurements are made at nominally 1 atmosphere For true in vacuo relative density calculations air pressure must be considered see below.

Here temperature is being specified using the current ITS scale and the densities  used here and in the rest of this article are based on that scale.

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The temperatures of the two materials may be explicitly stated in the density symbols; for example: Uses[ edit ] Relative density can also help to quantify the buoyancy of a substance in a fluidor determine the density of an unknown substance from the known density of another. Relative density is often used by geologists and mineralogists to help determine the mineral content of a rock or other sample. Gemologists use it as an aid in the identification of gemstones. Water is preferred as the reference because measurements are then easy to carry out in the field see below for examples of measurement methods. The aluminum tile will have larger mass. The reasons that the same volumes of aluminum and wood have different masses are their densities. The greater the mass of the body at the same volumethe body will have a higher density. Density is proportional to body mass. In our experiment, the density of aluminum is higher. In order to show how density depends on the volume of the body, we will report the following: In one of the glasses we pour water up to a mark of ml, and in the other we will pour sand until the handler comes to zero, until we get the same mass of sand and water.

We will notice that the volume of the sand is smaller and can be read from the glass. The smaller the volume at the same weight the density will be greater. The density is inversely proportional to the volume of the body.

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A body with a smaller volume will have a higher density if their masses are the same. A physical aspect that is determined by weight and volume is called density of a body or substance.

Density shows us how much of the mass of a certain substance stays in the volume unit 1m3. The mass of 1m3 of gold is Density is equal to the body mass put in 1 m3 volume. Density of the body is obtained when the body mass is divided by its volume: 