More precise estimate of Avogadro's number to help redefine kilogram

Phys.Org ^ | July 14, 2015 | Provided by: American Institute of Physics

[mrsmith]

Bad as the metric system is they’d just replace it with something based on “climate change constants”...

[Red Badger]

I read once that if the Earth was reduced to the size of a billiard cue ball, it would be smoother than a cue ball. I suppose at the atomic level it doesn’t make much difference................

[Red Badger]

The Metric System is easy!....................

[steve8714]

A pint’s a pound the world around.

[Red Badger]

Only if it’s water..............

[conservatism_IS_compassion]

It would seem to me that if Si-28 has “cubic cells”, wouldn’t it be easier to measure the mass if it were in the shape of a cube rather than a sphere? Wouldn’t the surface of the sphere, at the atomic level, have partial cubic cells, thus making them harder to count? /tt>

I read once that if the Earth was reduced to the size of a billiard cue ball, it would be smoother than a cue ball.

I read the same thing.

I suppose at the atomic level it doesn’t make much difference................

But then, 20 atoms in 602.2 sextillion "doesn’t make much difference” to most of us, either.

[zeugma]

I’d hate to be the guy whose job is to count all those Carbon-14 atoms.

It's a boring job, but someone's gotta do it.

[Red Badger]

It seems to me that it would be easier to separate 20 atoms all by themselves then you can weigh them.................;^)

[Hawthorn]

>> The Metric System is easy <<

Oh yeah? Just put some litres in a gas tank that was designed to use gallons. Then you’ll probably find out how “easy” it can be to damage your engine.

[NoCmpromiz]

only if you catch them at peak ripeness. which is the hard part.

But...

Ripe avocados are not hard...

I'll go catch up on the rest of the threads now... ;-)

[SunkenCiv]

Thanks Red Badger.

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[onedoug]

Thank you.