what is the difference between density and relative density of a substance
When you are talking about the mass by unit volume, it is called as density.
For eg. Density of water = 1000 kg m-3
Density of any other substance = x
Depending upon what the value of 'x' is, the other substance may sink / float.
But when you are 'comparing' the density of value of object x to the density of water, it is reffered to as relative density.
For eg. Density of any substance = 1000 kg m-3
But, if Density of water = 1 kg m-3,
Then acc. to the formula,
Relative Density = DENSITY OF THE OBJECT/DENSITY OF WATER
= 1000/1 = 1000
Since it is more than the 1, obviously it will sink.
This is the concept.
Hope it helps.
Density is defined as mass per volume. Density of a material is the amount of substance contained in unit volume of the material. SI unit of density is kg/m3.
Relative density is the ratio of density of a substance to the density of a reference material. Usually, the reference material is water. Relative density is also known as specific gravity.
The density of a substance is defined as mass of the substance per unit volume i.e
Density = Mass / Volume .
The SI unit of density is kg/m3
The Relative Density of a substance is the ratio of its density to that of water. i.e
Relative Density = Density of substance / Density of water.
Relative Density is unitless.
The density of a substance is defined as the mass per unit volume of that substance. The SI unit of density is kg/m3.
The relative density of a substance is the ratio of its density to that of a reference material. Usually, the reference material is water. Relative density is also known as specific gravity. It is a pure number, and has no unit