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