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The British pound is 0.45359237 kg, no?


Or 1.27 USD. Today. According to Google. Which is pegged to some market rate at some time. Which may differ based on your exact location and the conditions in the area. And is expected to be different a short time from now.


It could have been 0.5639472942kg just as easily.


I think we need an investigation into why the British Pound isn't allowed to float.

The fixed exchange rate between pounds and kg is obsolete and inappropriate for a modern economy and is the kind of thing BREXIT was supposed to free us from.


I’m pretty sure a pound could float, as long as it was made large enough.


Thats, you, what? The british pound is a currency, it is fiat, its exchange value freely floats against other world currencies, it has no objective measure in mass of anything.


Oh, how exciting: there are special units of measure for currants, as there are for wood, paper, gold, and so on? Is the the same in all regions where currants are cultivated?

It's wonderful that we have different miles and feet for different purposes, and even different exchange rates between them.

Let the Europeans suffer under the yoke of the rigid and procrustean french measurement system. Let freedom of expression flourish!


What exactly is a kg?


(Pulls off edgyquant’s mask) Sorry Derek from Veritasium, you’re only getting one video linked in this thread.


Basically 1,000 grams.


I think you mean that 1000 grammes is precisely a kg, the weight of which fluctuates a bit, not that anyone can do anything about it.


> the weight of which fluctuates a bit,

Not sure if this is a joke about weights changing over time or in different places due to gravitational differences - but if you mean mass that was true until fairly recently, the kg is no longer defined by the mass of a specific physical item.


What is a gram?


A gram is the division of a standard Kilogram (Kg ) into 1000 divisions. It's a poor description to both be circular about it, but the Kg is the standard measure of mass. Look to The definition of the standard kilogram.

"Since the revision of the SI on 20 May 2019, we can now compare the gravitational force on an object with an electromagnetic force using a Kibble balance. This allows the kilogram to be defined in term of a fixed numerical value of the Planck constant, a constant which will not change over time."

"A Kibble balance is an electromechanical measuring instrument that measures the weight of a test object very precisely by the electric current and voltage needed to produce a compensating force. It is a metrological instrument that can realize the definition of the kilogram unit of mass based on fundamental constants."

"One important reason for the change is that Big K is not constant. It has lost around 50 micrograms (about the mass of an eyelash) since it was created. But, frustratingly, when Big K loses mass, it's still exactly one kilogram, per the current definition. When Big K changes, everything else has to adjust."


1/12th of the weight of 6.02214076×10^20 carbon 12 atoms.


Basically 1 gram.


Uh-huh, precisely, in Paris.




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