⚜

e) Prefixes

e) prefixes and their symbols to indicate decimal submultiples or multiples of units

in relation to metres (m):

  • pico- (pm) = 10^-12

  • nano- (nm) = 10^-9

  • micro- (µm) = 10^-6

  • milli- (mm) = 10^-3

  • deci- (dm) = 10^-1

  • centi- (cm) = 10^-2

  • kilo- (km) = 10³

  • mega- (Mm) = 10^6

  • giga- (Gm) = 10^9

  • tera- (Tm) = 10^12

when converting between two units:

  • find the difference in its power of ten

  • multiply if the unit is smaller, divide if the unit is larger