2.1.2: si units Flashcards
1
Q
define ‘prefix’
A
a word or letter placed before another one
2
Q
what are the prefixes in order from smallest to largest
A
femto
pico
nano
micro
milli
centi
deci
kilo
mega
giga
tera
peta
3
Q
define ‘base unit’
A
one of seven units that form the building blocks of the si measurement system
4
Q
define ‘derived unit’
A
a unit used to represent a derived quantity
4
Q
define ‘derived quantity’
A
a quantity that comes from a combination of base units
4
Q
what are the derived quantities expressed in si units
A
force (kgms^-2)
pressure (Nm^-2)
energy (Nm)
power (Js^-1)
electric potential difference (JC^-1)
electric resistance (VA^-1)
electric charge (As)
frequency (s^-1)
