Which quantity is measured in Kg `m^2 s^(-2)`.

Quantity of electricity is measured in :

A physical quantity P is related to four observables p=(a^2b^3)/sqrt(cd) .The percentage of error of measurement a,b,c,d are 1%,3%,4% and 2% respectively what is the percentage of error in the quantity P?

Electric current is measured in_____and is a_____quantity.

Which Physical quantities have the same dimension ML^(2)T^(-2) ?

In defining the standard of length we have to specify the temperature at which measurement should be made. Are we justified in calling length a fundamental quantity if another physical quantity, temperature has to be specified in choosing a standard?