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"Jigawatts! Doc, What the Hell is a
Jigawatt?" |
Marty McFly to Doc Brown in "Back to the Future" |

I got an email recently asking
if "jigawatt" was a real term, and what terms were used to describe large
numbers of watts. Well, is "jigawatt" real? The answer is "yes"
and "no"!
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Just to add fuel to the fire, fish have gills (as in giggle),
but I drink beer by the gill (as in jiggle or jill).
A gill is 4 fluid ounces, 118.3 mL in the US and 142.1 mL in the UK.
(Thanks to Keith Oldham for pointing this out to me some years ago!)
 
The following table was adapted from NIST Special Publication 811 which is available online at
http://physics.nist.gov/Pubs/contents.html
or in PDF format from http://physics.nist.gov/cuu/pdf/sp811.pdf.
My tax dollar at work! (You can download the Adobe® Acrobat® Reader from Adobe's
website).
Factor |
Prefix |
Symbol |
|
10 3 |
kilo |
k |
10 6 |
mega |
M |
10 9 |
giga |
G |
10 12 |
tera |
T |
10 15 |
peta |
P |
10 18 |
exa |
E |
10 21 |
zetta |
Z |
10 24 |
yotta |
Y |
|
Also in common usage: |
10 1 |
deka |
da |
10 2 |
hecto |
h |
|
Factor |
Prefix |
Symbol |
|
10 -3 |
milli |
m |
10 -6 |
micro |
µ |
10 -9 |
nano |
n |
10 -12 |
pico |
p |
10 -15 |
femto |
f |
10 -18 |
atto |
a |
10 -21 |
zepto |
z |
10 -24 |
yocto |
y |
|
Also in common usage: |
10 -1 |
deci |
d |
10 -2 |
centi |
c |
|
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