Kilogram, second, meter, meters cubed, and kelvin.
volts, amperes, ohms, hertz, watts
The two most common systems of units are cgs and SI systems
There are 7 base SI units and all other are defined using these 7 base units. See the related question below:[http://wiki.answers.com/Q/What_are_all_the_SI_unitsWhat are all SI units?]
Base units
In a system of units such as the SI, BASE UNITS are defined; other units are derived from those.For example, in the SI, the meter, the kilogram, and the second are base units; the units for area (meters squared), for speed and velocity (meters/second), etc. are derived from the base units. Which units are base units, and which units are derived units, really depends on how the unit is defined. For example, in the SI, pressure is a derived unit; but you can just as well invent a system in which pressure is a base unit, and some other units, that are base units in the SI, are derived in this new system.
Seven metric base units make up the foundation of SI. And Specific combinations of SI base units yield derived units. That's why the differ.
The two most common systems of units are cgs and SI systems
There are seven SI base units. Refer to the related link below for a table of the seven SI base units.
MeterLiterGramAnswerOnly one of the above units is an SI base unit: the metre. In fact, there are seven, not three, base units. These are the metre, the kilogram, the second, the ampere, the kelvin, the candela, and the mole.
There are 7 base SI units and all other are defined using these 7 base units. See the related question below:[http://wiki.answers.com/Q/What_are_all_the_SI_unitsWhat are all SI units?]
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A Joule in SI base units is: 1 kg · m2/s2