The kg is dead, long live the kg

The video discusses the redefinition of four SI base units: kilogram, Kelvin, mole, and ampere. The kilogram, previously defined by a physical object, will now be based on Planck's constant, which will have a fixed value. This change aims to eliminate uncertainties and improve measurement precision. The redefinition impacts other units like the mole, ampere, and Kelvin, aligning them with fundamental constants. While most people won't notice changes, the update ensures consistency and reliability in scientific measurements. The video emphasizes the importance of precise measurements in advancing scientific understanding.

Discuss the relationship between Avogadro's constant and the new definition of Planck's constant.

How will the new definitions of SI units affect everyday measurements for most people?

What is the ultimate goal of redefining the SI units according to the text?