The need for finding a new measure of Kilogram arose after scientists found that the BIPM ( the intergovernmental organization through which Member States act together on matters related to measurement science and measurement standards)prototype is losing mass.
There was a slight change in the weight of the artifact -- the reason could be anything from loss of impurities in the metals, to the witnesses gaining mass by accumulating contaminants.
Scientists want to redefine the kilogram using Planck's Constant, a value from quantum mechanics .
They are also using a tool called a Kibble balance. Instead of balancing the scale with weights, they use electromagnetism.
In this method, an electrical current is sent through a coiled wire, generating a magnetic field that creates the upward force needed to balance the scale.
Scientists can figure out the strength of that field by pulling on the coil. If we know the voltage, the current and the velocity at which the coil was pulled, we can calculate the Planck constant with extreme precision.
