Question

Even after having adopted SI units, we are still using old systems of

units for measurement at some places. Find these places...​

Answer 1

Answer:

In the redefinition, four of the seven SI base units – the kilogram, ampere, kelvin, and mole – were redefined by setting exact numerical values when expressed in SI units for the Planck constant (h), the elementary electric charge (e), the Boltzmann constant (kB), and the Avogadro constant (NA), respectively.