2.1 Physical Quantities, Units and Measurements Flashcards
1
Q
Why have SI base units?
A
A kilogram, a newton or an ampere must mean the same thing to two different physicists on the other side of the world from each other. They give a UNIVERSAL measuring system.
2
Q
What do prefixes show?
A
Multiples and submultiples of each other.
3
Q
What different types of error are there?
A
Systematic error and random errors - concerned with accuracy and precision.
