M
|
10−6
|
micro
|
μ
|
109
|
giga
|
G
|
10−9
|
nano
|
n
|
1012
|
tera
|
T
|
10−12
|
pico
|
P
|
1015
|
peta
|
P
|
10−15
|
femto
|
f
|
1018
|
exa
|
E
|
10−18
|
atto
|
a
|
METRIC UNITS OF MEASUREMENT
The metric system was first proposed in 1791. The French Revolutionary Assembly adopted it in 1795, and the first metric standards (a standard meter bar and kilogram bar) were adopted in 1799.
7. Units of Length
Name
|
Symbol
|
Value
|
millimeter
|
mm
|
1 mm = 0.001 m
|
centimeter
|
cm
|
1 cm = 10 mm
|
decimeter
|
dm
|
1 dm = 10 cm
|
meter
|
m
|
1 m = 10 dm = 1000 mm
|
dekameter
|
dam
|
1 dam = 10 m
|
hectometer
|
hm
|
1 hm = 10 dam
|
kilometer
|
km
|
1 km = 10 hm = 1000 m
|
8. Units of Area
Name
|
Symbol
|
Value
|
sq. millimeter
|
mm2
|
1 mm2 = 0.000001 m2
|
sq. centimeter
|
cm2
|
1 cm2 = 100 mm2
|
sq. decimeter
|
dm2
|
1 dm2 = 100 cm2
|
sq. meter
|
m2
|
1 m2 = 100 dm2
|
sq. decameter
|
dam2
|
1 dam2 = 100 m2
|
sq. hectometer
|
hm2
|
1 hm2 = 100 dam2
|
sq. kilometer
|
km2
|
1 km2 = 100 hm2
|
9. Units of Liquid Value
Name
|
Symbol
|
Value
|
milliliter
|
mL
|
1 mL = 0.001 L
|
centiliter
|
cL
|
1 cL = 10 mL
|
deciliter
|
dL
|
1 dL = 10 cL
|
liter
|
L
|
1 L = 10 dL = 1000 mL
|
dekaliter
|
daL
|
1 daL = 10 L
|
hectoliter
|
hL
|
1 hL = 10 daL
|
kiloliter
|
kL
|
1 kL = 10 hL = 1000 L
|
10. Units of Volume
Name
|
Symbol
|
Value
|
cu. millimeter
|
mm3
|
1 mm3 = 10 −9 m3
|
cu. centimeter
|
cm3
|
1 cm3 = 1000 mm3
|
cu. decimeter
|
dm3
|
1 dm3 = 1000 cm3
|
cu. meter
|
m3
|
1 m3 = 1000 dm3
|
11. Units of Mass
Name
|
Symbol
|
Value
|
milligram
|
mg
|
1 mg = 0.001 g
|
centigram
|
cg
|
1 cg = 10 mg
|
decigram
|
dg
|
1 dg = 10 cg
|
gram
|
g
|
1 g = 10 dg
|
dekagram
|
dag
|
1 dag = 10 g
|
hectogram
|
hg
|
1 hg = 10 dag
|
kilogram
|
kg
|
1 kg = 10 hg = 1000 g
|
megagram
|
Mg
|
1 Mg = 1000 kg = 1 t
|
U.S. UNITS OF MEASUREMENT
Most of the U.S. system of measurements is the same as that forthe U.K. The biggest differences to be noted are