A laboratory decides to adopt the decimetre ( ) as its fundamental unit of length…
PHYSICS · Multi-part · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
A laboratory decides to adopt the decimetre (1dm=0.1m) as its fundamental unit of length while retaining the kilogram and the second as its units of mass and time.
Answer the following questions with brief reasoning.
(i) How many units of area expressed in square decimetres make up one square metre?
(ii) How many units of volume expressed in cubic decimetres make up one cubic metre?
(iii) Explain qualitatively why the numerical factors obtained in parts (i) and (ii) differ even though the change of unit is the same in both cases.