With 'n' variables and 'm' fundamental dimensions in a system, which one of the following statements relating to the application of the buckingham's pi Theorem is incorrect ?

 

With experience, pi terms can be written simply by inspection of variables in a flow system.

Buckingham's pi theorem is not directly applicable in compressible flow problem.

Buckingham's pi theorem yields dimensionless pi terms given by the difference between the number of variables and the number of fundamental dimensions.

Buckingham's pi theorem reduces the number of variables by the number of fundamental dimensions involved.