Init. How is 'one standard kilogram' defined in SI system?
What is weight? Write down its SI unit.

The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.62607015×10−34 when expressed in the unit J⋅s, which is equal to kg⋅m2⋅s−1, where the metre and the second are defined in terms of c and ΔνCs.

talk back to him about the sport and show him your expertise or leave the room