2.1.2: si units

Question 1

define ‘prefix’

Answer 1

a word or letter placed before another one

Question 2

what are the prefixes in order from smallest to largest

Answer 2

femto
pico
nano
micro
milli
centi
deci
kilo
mega
giga
tera
peta

Question 3

define ‘base unit’

Answer 3

one of seven units that form the building blocks of the si measurement system

Question 4

define ‘derived unit’

Answer 4

a unit used to represent a derived quantity

Question 4

define ‘derived quantity’

Answer 4

a quantity that comes from a combination of base units

Question 4

what are the derived quantities expressed in si units

Answer 4

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)