18. Which one of the following is not a fundamental quantity?
(a) Length (b) Mass (c) Volume (d) Time
19. Which one of the following is not a derived quantity
(a) density (b) mass (c) volume (d) speed
Fundamental quantities are independent, that do not have no so called formula.
Eg :- Length, Mass, Time (these do not have formulae)
Derived quantities are depenedent on fundamental quantities. They are brought and derived from the fundamental quantities,
Eg :- Volume (= metre3), density = (mass/volume) etc
So, the answers are :
18. c Volume is a derived quantity
19. b Mass is independent
Eg :- Length, Mass, Time (these do not have formulae)
Derived quantities are depenedent on fundamental quantities. They are brought and derived from the fundamental quantities,
Eg :- Volume (= metre3), density = (mass/volume) etc
So, the answers are :
18. c Volume is a derived quantity
19. b Mass is independent