Question

what are derived units? Find the derived SI unit of density ,frequency, pressure and energy from fundamental SI units? ​

Answer 1

SI derived units are units of measurement derived from the seven base units specified by the International System of Units (SI). They are either dimensionless or can be expressed as a product of one or more of the base units, possibly scaled by an appropriate power of exponentiation.

♦ The SI unit for density is the kilogram per cubic meter (kg/m3).

♦Unit of frequency is 1/s so it is a derived unit which is commonly called Hz.

♦The unit of pressure in the SI system is the pascal (Pa),

♦We define 1 Newton-meter as 1 joule. This is how the unit of energy is derived