For length Meter and for time Second.
Time . . . SecondMass . . . KilogramLength . . . Meter
The principal SI units used to derive all other SI units are the base SI units. These are the units for physical quantities such as length, time, mass, electric current, temperature, amount of substance, and luminous intensity.
The base (SI) unit is meter.
"si" stands for the International System of Units, which is the modern form of the metric system. It is based on seven base units, one of which is the meter for length.
The base unit for length is the metre, the base unit for mass is the kilogram.
The SI unit for length is metre (m).The SI unit for mass is kilogram (kg).
The meter (m) is the SI base unit for the measurement of length.
In the SI, it is DEFINED as a base unit, together with the unit of length, the unit of time, and a few others. Other units are derived from these base units.
The fundamental SI units for mass, length, and time are kilograms, meters, and seconds, respectively.
In the SI, it is DEFINED as a base unit, together with the unit of length, the unit of time, and a few others. Other units are derived from these base units.
The Meter (length) and Kelvin (temperature)
The International System of Units (SI) is based on seven base units: the meter for length, kilogram for mass, second for time, ampere for electric current, kelvin for temperature, mole for amount of substance, and candela for luminous intensity. These base units are used to derive other units for quantities such as area, volume, and velocity.