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Useful Tables

Nato Phonetic Alphabet

alfa bravo charlie delta echo foxtrot golf
hotel india juliett kilo lima mike november
oscar papa quebec romeo sierra tango uniform
victor whisky xray yankee zulu

Metric prefixes

Name Symbol Base 10 Decimal
yotta Y $10^{24}$ 1000000000000000000000000
zetta Z $10^{21}$ 1000000000000000000000
exa E $10^{18}$ 1000000000000000000
peta P $10^{15}$ 1000000000000000
tera T $10^{12}$ 1000000000000
giga G $10^9$ 1000000000
mega M $10^6$ 1000000
kilo k $10^3$ 1000
hecto h $10^2$ 100
deca da $10^1$ 10
$10^0$ 1
deci d $10^{−1}$ 0.1
centi c $10^{−2}$ 0.01
milli m $10^{−3}$ 0.001
micro $\mu$ $10^{−6}$ 0.000001
nano n $10^{−9}$ 0.000000001
pico p $10^{−12}$ 0.000000000001
femto f $10^{−15}$ 0.000000000000001
atto a $10^{−18}$ 0.000000000000000001
zepto z $10^{−21}$ 0.000000000000000000001
yocto y $10^{−24}$ 0.000000000000000000000001

Electromagnetic Spectrum

EM Spectrum
2022-08-09