The SI has special names for 22 of these coherent derived units (for example, hertz, the SI unit of measurement of frequency), but the rest merely reflect their derivation: for example, the square metre (m2), the SI derived unit of area; and the kilogram per cubic metre (kg/m3 or kg⋅m−3), the SI derived unit of density.
The SI has special names for 22 of these coherent derived units (for example hertz the SI unit of measurement of frequency) but the rest merely reflect their derivation for example the square metre (m2) the SI derived unit of area; and the kilogram per cubic metre (kg/m3 or kg⋅m−3) the SI derived unit of density