Extra materials - Units

basic units and prefixes

Units for three SI base quantities

Quantity Unit Name Unit Symbol
Length [L] meter m
Time [T] second s
Mass [M] kilogram kg

Some prefixes for SI Units that you must remember!

Factor Prefix Symbol
\(10^9\) giga- G
\(10^6\) mega- M
\(10^3\) kilo- k
\(10^{-2}\) centi- c
\(10^{-3}\) milli- m
\(10^{-6}\) micro- \(\mu\)
\(10^{-9}\) nano- n

exponent rules

volume and surface area

1 horse-sized duck or 100 duck-sized horses?