I dont' know. 90?
This is from my 8th grade science text book !!!! It is based on the number TEN (10)
A magnitude is a pure number - with no SI unit.
The SI unit of mass is the kilogram. However the prefixes are based on the gram.
the SI is a systenm based on the number ten.
Kelvin The SI base unit of temperature is the kelvin.
The SI unit for frequency is Hertz, the number of cycles per second.
Its based on the speed of light.
The basic SI unit is for length. Volume is a measure which is based on length-cubed and so it is a derived (not complex) unit.
The SI unit for measuring matter is the kilogram (kg). This unit is used to quantify the amount of mass in an object or substance.
The kelvin is not considered a fundamental unit in the International System of Units (SI). It is a derived unit that is based on the fundamental unit of temperature in SI, the degree Celsius. The kelvin is used to measure thermodynamic temperature.
The SI unit for frequency is Hertz, the number of cycles per second.
Not really. The second is one of the SI system's seven BASE (not 'basic') units.