Difference between revisions of "Units of measurement in Majocco"

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Revision as of 19:51, 3 February 2024

Prefixes

Like all metric systems, the SI uses metric prefixes to systematically construct, for the same physical quantity, a set of units that are decimal multiples of each other over a wide range.

Prefixes are added to unit names to produce multiples and submultiples of the original unit. All of these are integer powers of ten, and above a hundred or below a hundredth all are integer powers of a thousand.

For example, kilo- denotes a multiple of a thousand and milli- denotes a multiple of a thousandth, so there are one thousand millimetres to the metre and one thousand metres to the kilometre.

The prefixes are never combined, so for example a millionth of a metre is a micrometre, not a millimillimetre. Multiples of the kilogram are named as if the gram were the base unit, so a millionth of a kilogram is a milligram, not a microkilogram.

SI prefixes
Prefix Base 10 Decimal
Name Symbol
quetta Q 1030 1000000000000000000000000000000
ronna R 1027 1000000000000000000000000000
yotta Y 1024 1000000000000000000000000
zetta Z 1021 1000000000000000000000
exa E 1018 1000000000000000000
peta P 1015 1000000000000000
tera T 1012 1000000000000
giga G 109 1000000000
mega M 106 1000000
kilo k 103 1000
hecto h 102 100
deca da 101 10
— — 100 1
deci d 10−1 0.1
centi c 10−2 0.01
milli m 10−3 0.001
micro μ 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
ronto r 10−27 0.000000000000000000000000001
quecto q 10−30 0.000000000000000000000000000001

Units

Acceleration

Name Abbreviation SI Units
Meters Per Second Per Second m/s2 1 m/s2

Amount of Substance

Name Abbreviation SI Units
Mole mol 1mol

Angle

Area

Name Abbreviation SI Units
Radian rad 1rad
Steradian Sr 1sr
Name Abbreviation SI Units
Square Meter m2 1m2
Square Kilometer km2 1000000m2
Square Mile mi2 ≈2590000m2

Atomic

Name Abbreviation SI Units
becquerel Bq 1Bq
Gray Gy 1Gy
sievert Sv 1Sv

Current

Name Abbreviation SI Units
Ampere A 1A

Force

Name Abbreviation SI Units
Newton N 1N

Frequency

Name Abbreviation SI Units
Hertz Hz 1Hz

Length

Name Abbreviation SI Units
Millimeter mm 0.001m
Centimeter cm 0.01m
Decimeter dm 0.1m
Meter m 1m
Dekameter dam 10m
Hectometer hm 100m
Kilometer km 1000m
Astronomical Unit au ≈149597870691m

Luminosity

Name Abbreviation SI Units
Candela cd 1cd

Mass

Name Abbreviation SI Units
Picogram pg 0.000000000000001kg
Nanogram ng 0.000000000001kg
Microgram µg 0.000000001kg
Milligram mg 0.000001kg
Gram g 0.001kg
Kilogram kg 1kg
Tonne ton 1000kg
Megagram Mg 1000000kg

Power

Name Abbreviation SI Units
Watt W 1W
Horsepower hp 745.7W
Kilowatt kW 1000W

Pressure

Name Abbreviation SI Units
Pascal Pa 1Pa
Atmosphere atm 101325Pa

Temperature

Name Abbreviation SI Units
Degrees Kelvin K 1K
Degrees Celsius °C ≈1K+273.15

Time

Name Abbreviation SI Units
Planck Time tP ≈0.000000000000000000000000000000000000000000053905s
Nanosecond ns 0.000000001s
Millisecond ms 0.001s
Second s 1s
Minute min 60s
Hour hr 3600s
Day day 86400s

Velocity

Name Abbreviation SI Units
Kilometers Per Hour km/h ≈0.278 m/s
Meters Per Second m/s 1 m/s

Volume

Name Abbreviation SI Units
Cubed Centimeter cm3 0.000001m3
Cubed Meter m3 1m3

Work

Name Abbreviation SI Units
Joule J 1J
Calorie cal 4.184J
Kilocalorie kcal 4184J
Kilowatt-Hour kWh 3600000J
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