Measurement Systems
System International Units
|
|
SI units |
SI Abbreviations |
Other Abbreviations |
|
length |
meter |
m |
|
|
volume |
liter |
L |
l |
|
mass |
kilogram |
kg |
kgm |
|
time |
second |
s |
sec |
|
temperature |
kelvin |
K |
°K |
Other Metric Units
|
1 micron (m ) = 1 micrometer (mm) = 10 –6 meter mm m 1 angstrom (Å or A) = 10 –10
meter = 10-8 cm 0.1nm Å |
Prefixes for Use with Basic Units
of Metric System
|
Prefix |
Symbol |
Power |
Equivalent |
|||
|
Yotta |
Y |
1024 |
= |
1,000,000,000,000,000,000,000,000 |
|
|
|
Zetta |
Z |
1021 |
= |
1,000,000,000,000,000,000,000 |
|
|
|
Exa |
E |
1018 |
= |
1,000,000,000,000,000,000 |
|
|
|
Peta |
P |
1015 |
= |
1,000,000,000,000,000 |
|
|
|
Tera |
T |
1012 |
= |
1,000,000,000,000 |
Trillion |
|
|
Giga |
G |
109 |
= |
1,000,000,000 |
Billion |
|
|
Mega |
M |
106 |
= |
1,000,000 |
Million |
|
|
Kilo |
k |
103 |
= |
1,000 |
Thousand |
|
|
Hecto |
h |
102 |
= |
100 |
Hundred |
|
|
Deca |
da |
101 |
= |
10 |
Ten |
|
|
¾ |
¾ |
100 |
= |
1 |
One |
|
|
Deci |
d |
10-1 |
= |
0.1 |
Tenth |
|
|
Centi |
c |
10-2 |
= |
0.01 |
Hundredth |
|
|
Milli |
m |
10-3 |
= |
0.001 |
Thousandth |
|
|
Micro |
m |
10-6 |
= |
0.000001 |
Millionth |
|
|
Nano |
n |
10-9 |
= |
0.000000001 |
Billionth |
|
|
Pico |
p |
10-12 |
= |
0.000000000001 |
Trillionth |
|
|
Femto |
f |
10-15 |
= |
0.000000000000001 |
|
|
|
Atto |
a |
10-18 |
= |
0.000000000000000001 |
|
|
|
Zepto |
z |
10-21 |
= |
0.000000000000000000001 |
|
|
|
Yocto |
y |
10-24 |
= |
0.000000000000000000000001 |
|
|
|
|
|
|||||
|
Examples: |
1000 meters = 1 kilometer = 1km |
|||||
|
|
106 hertz = 1 megahertz = 1 MHz |
|||||
|
|
10-3 sec = 1 millisecond = 1 msec |
|||||
Conversion Factors
|
1 erg = 10-7 joule = 10-7 kg · m2/s2 1 joule = 6.2419 x 1018 eV 1 in = 25.4 mm = 2.54 cm 1 yd = 0.9144 m 1 mi = 1.6093 km » 8/5 km 1 oz = 28.3 g 1 lb = 0.4536 kg |
Binary Prefixes
|
kibi |
210 = 1,024 |
|
mebi |
220 = 1,048,576 |
|
gibi |
230 = 1.0737 x 109 |