The SI system
Name | Symbol | Coefficient | Name | Symbol | Coefficient |
---|---|---|---|---|---|
exa | E | [[$ 10^{18}$]] | deci | d | [[$10^{-1}$]] |
peta | P | [[$ 10^{15}$]] | centi | c | [[$10^{-2}$]] |
tera | T | [[$ 10^{12}$]] | milli | m | [[$10^{-3}$]] |
giga | G | [[$10^{9}$]] | micro | μ | [[$10^{-6}$]] |
mega | M | [[$10^{6}$]] | nano | n | [[$10^{-9}$]] |
kilo | k | [[$10^{3}$]] | pico | p | [[$10^{-12}$]] |
hecto | h | [[$10^{2}$]] | femto | f | [[$10^{-15}$]] |
deca | da | [[$10^{1}$]] | atto | a | [[$10^{-18}$]] |
Quantity | Unit | Symbol | Equivalency |
---|---|---|---|
time | minute | min | 1 min = 60 s |
hour | h | 1 h = 60 min | |
day | d | 1 d = 24 h | |
year | a | 1 a [[$\approx $]] 365 d | |
plane angle | degree | ° | 1° = 60' |
minute | ' | 1' = 60'' | |
second | '' | ||
volume | litre | l | 1 l = 1 dm3 |
mass | tonne | t | 1 t = 1000 kg |
atomic mass unit | u | 1 u = 1.6605402 [[$\cdot$]] 10-27 kg | |
length | astronomical unit | AU | 1 AU = 0.1495979 [[$\cdot$]] 1012 m |
parsec | pc | 1 pc = 30.85678 [[$ \cdot$]] 1015 m |
Length | 1 ″ = 1 in = 1 inch = 25.40 mm |
---|---|
1 ′ = 1 ft = 1 foot = 0.3048 m | |
1 yd = 1 yard = 0.9144 m | |
1 mi = 1 mile = 1.609344 km | |
1 NM = 1 M = 1 nautical mile = 1852 m | |
1 light year = 9.46055 [[$ \cdot$]] 1015 m | |
1 AU = astronomical unit = 149.5979 [[$ \cdot $]] 109 m | |
Mass | 1 ct = 1 carat = 0.2 g |
1 u = 1.6605402 [[$\cdot$]] 10-27 kg | |
1 lb = 1 pound = 0.4536 kg | |
1 oz = 1 ounce = 28.35 g | |
Plane angle | 1° = 2[[$ \pi / $]]360 rad |
Area | 1 b = 1 barn = 10-28 m2 |
1 acre = 4.0469 [[$ \cdot $]] 103 m2 | |
Volume | 1 l = 1 dm3 = 0.001 m3 |
1 bbl = 1 barrel = 0.1589873 m3 | |
1 gal = 1 gallon (UK) = 4.546092 l | |
1 gal = 1 gallon (US) =3.785412 l | |
Speed | 1 knot = 1 NM/h = 1.852 km/h = 0.5144 m/s |
Name | Symbol | Numeric value and unit |
---|---|---|
acceleration of free fall | [[$g$]] | [[$ \text{9.80665} $]] m/s2 |
light speed | [[$c$]] | [[$ \text{2.99792458}\cdot 10^{8}$]] m/s |
electron mass | [[$m_e$]] | [[$ \text{9.1093897}\cdot 10^{-31}$]] kg |
proton mass | [[$m_p$]] | [[$ \text{1.6726231} \cdot 10^{-27}$]] kg |
neutron mass | [[$m_n$]] | [[$\text{1.6749286} \cdot 10^{-27}$]] kg |