Is it correct to add two vectors representing physical quantities having different dimensions?

Can two different physical quantities have same dimensions?

Which of the following set have different dimensions?

Two vectors of different physical quantities can be __________ to obtain a scalar.

Vectors are physical quantities which are completely specified by ___________

The physical quantity having the unit dyne g^(-1) is________ .

Right or wrong ? If wrong , write the correct sentence : It is enough to select a few out of many physical quantities and standardize their units .

Chose the correct option For 2 vectors to be equal, they should have

In Young's double slit experiment , the two coherent sources have different intensities . If the ratio of maximum intensity to the minimum intensity in the interference pattern produced is 25 : 1 . What was the ratio of intensities of the two sources ?

Answer the following questions: Give one example of a physical quantity which does not have direction.