2.1 Quantities and Units Flashcards
Name the 7 SI base quantities and units
I Am Much Taller Than Leprechauns
Length, mass, time, electric currents, temperature, amount of a substance ( mole )
And also light intensity ( not assessed )
A homogeneous formula means that…
The units on the left hand side of the formula are equal to the right hand side of the formula
The prefix in front of a unit tells you…
The factor of ten by which the unit is multiplied
Name and factor of SI prefix ‘T’
Tera, 10^12
Name and factor of SI prefix ‘G’
Giga, 10^9
Name and factor of SI prefix ‘M’
Mega, 10^6
Name and factor of SI prefix ‘K’
Kilo, 10^3
Name and factor of SI prefix ‘c’
Centi, 10^-2
Name and factor of SI prefix ‘m’
Milli, 10^-3
Name and factor of SI prefix ‘u’
Micro, 10^-6
Name and factor of SI prefix ‘n’
Nano, 10^-9
Name and factor of SI prefix ‘p’
Pico, 10^-12
Name and factor of SI prefix ‘f’
Femto, 10^-15
How should a quantity be written in a column heading/axis title/graph
They should be separated by a forward slash
Any prefix or power of ten should go after the forward slash an before the unit
Define SI units
International standard of units for physical quantities and units
Define base units
Unit
From
Which
All
Other
Base
Units
Arre
Derived
Define base units
Standard unit which is base upon SI units
