One word answer: Pascal is the unit for which physical quantity?

Weber is the unit of which physical quantity?

Pascal is the S.I. unit of

Why do we have different units for same physical quantity?

A fundamental physical quantity

What are dimensions of a physical quantity?

Establish a relation between an electron volt and the S.I. unit of the physical quantity which it measures.

(Answer the following questions briefly and to the point :) Which physical quantity remains conserved in Simple Harmonic Motion ?

Define a compounded physical quantity .

Define elementary physical quantities .