Those units which are derived from the basic units of SI system are known as Derived units. For example: - the units of area are m2, which are derived from the basic units of length i.e. m. It is most often we find the basic SI ...

With scientific research going all over the world, the communication is very important. This communication becomes very easy if there is an agreement on international level regarding the use of single set of symbols and units for the physical quantities being used. So with the ...

In physical chemistry, there is always a need to measure physical quantities and these measurements involves a numerical ratio between two samples of quantity; one which has to be measured and other one being some standard sample of any kind. Let us suppose we have ...