What are the basic SI Units?

Question

What are the basic SI Units?

Answer 1

Offical Website (Bureau International des Poids et Mesures)

There are seven base units of the SI;

Metre, m (Unit of length);

The metre is the length of the path travelled by light in  vacuum during a time interval of 1/299 792 458 of a second.

Kilogram, kg (Unit of mass);

The kilogram is the unit of mass; it is equal to the mass of the international prototype of the kilogram.

Second, s (Unit of time);

The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.

Ampere, A (Unit of electric current);

The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 m apart in vacuum, would produce between these conductors a force equal to 2 x 10^-7 newton per metre of length.

Kelvin, K (Unit of thermodynamic temperature);

The kelvin, unit of thermodynamic temperature, is the fraction 1/273.16 of the thermodynamic temperature of the triple point of water.

Mole, mol (Unit of amount of substance);

The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12.

Candela, cd (Unit of luminous intensity);

The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 x 10^12 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian.

http://www.bipm.org/en/si/base_units/

http://physics.nist.gov/cuu/Units/curren...

Answer 2

The basic of SI Units are the kilograms and grams