How To Determine a Kilogram

[mikecurtis]

@Whack-a-Mole

Surprised this hasn’t been posted yet. Here is a great video describing this whole thing: Veritasium - The World’s Roundest Object

I did in a different thread

@mikecurtis

here’s an interesting video on trying to change the definition on a kilogram, so it no longer relies on the vagaries of a physical object.