What is the connection between specific weight and density?

Specific weight and density are related to the fact that a specific weight is a ratio based on a standard density used in science, water as a basic density of liquids and solids and air or hydrogen gas as a basic density for gases. The density is the average compactness of the substance, usually measured as pounds on a cubic track (pounds/ft 3 ) or kilograms per cubic meter (kg/m

3 ). The distribution of the density of the known substance by reference water density determines its specific weight. Clean gold has a specific weight of 19.33 and the density of the solid at room temperature 68 ° Fahrenheit (20 ° C) 19.30 grams per cubic centimeter (g/cm

3 ). The reason why these numbers seem so similar to is due to a reference point of water when calculating a specific weight, with a water density at a room temperature, very close to 1 g/cm 3

. The water density is actually 0.99823 g/cm 3 , leading to a slightly different number in specific gravity and density forsolids. Expressing the specific weight of Gold in more accurate terms, because the ratio of gold density to the water density would be 19.30 g/cm 3 divided by 0.99823 g/cm 3 to a equal ratio of 19.33/1.

expression of specific gravity and density with liquids include Pascal's law, which states that the pressure in a limited, incompressible volume of fluid is the same everywhere. Pressure considerations are also taken into account for the density of gases using the Act on Ideal Gas, to create approximation on the condition of gas, volume and temperature. With all specific gravity calculations, reference air density should be once an atmosphere of 14.7 lb/in

2 (101.3kPa).

One of the most visible values ​​of calculations of specific gravity and density is that the ratio immediately tells whether the material is sinking or floating in water. Any specific weight above one isThicker than water, but aluminum has a specific weight of only 2.7 at a room temperature compared to heavier metals such as gold. Potentially dangerous gases used in industry, such as Silane, which will spontaneously burn in the air, has a specific weight of 1.11. Knowing that it is just a little heavier than air helps to design fire suppression systems.

commercially, specific tables of gravity and density for various chemicals have a wide range of use. In gemology, the specific weight of the GEM sample is compared, also known as a relative density with a high quality reference to determine its value. Such values ​​are also used to determine the thickness of the shell to see if the eggs are strong enough to process the food marketing system to determine the compression force of the SROPA in the construction and the oil industry to determine the energy content of oil.