Units and DIMENSIONS - DENSITY and RELATIVE DENSITY
DENSITY AND RELATIVE DENSITY
Density of Water:
As discussed, the density of a material is defined as its mass per unit volume. It’s a measurement of how tightly matter is packed together. The density of a substance can be explained as the relationship between the mass of the substance and volume it takes up.The Density of Water can be defined as:
“It is the weight of water per its unit volume, which depends on temperature of water”.
The density of water is the weight of the water per its unit volume, which depends on the temperature of the water. The usual value used in calculations is 1 gram per millilitre (1 g/ml) or 1 gram per cubic centimetre
(1 g/cm3). ... The maximum density of water occurs around 4 degrees Celsius.
Density of water = 997 kg/m3 which is approximately equals to 1000 kg/m3(or)1 g/cm3
Water has its maximum density of 1g/cm3 at 4 degrees Celsius. When the temperature changes to either greater or less than 4 degrees, the density will become less then1 g/cm3. Water has the maximum density of 1 g/cm3 only when it is pure water.
RELATIVE DENSITY
Relative density (RD) is the ratio of the density of a object to the density of water. It is also known as specific gravity (SG). Because it is a ratio, relative density or specific gravity is a unitless value.
Relative density (RD)=\(= \frac{{density\,of\,body}}{{density\,of\,water\,at\,{4^0}c}}\)
With respect to volume also we can define relative density.
Relative density (RD) =\(= \frac{{mass\,of\,any\,volume\,of\,body}}{{mass\,of\,an\,equal\,volume\,of\,water}}\)
Relationship between units of density and Relative Density: