[time-nuts] One Kg Quartz Resonator

Mike S mikes at flatsurface.com
Tue Jan 22 20:32:51 EST 2013


On 1/22/2013 3:30 PM, Bruce Griffiths wrote:
> But can the number and type of atoms in such a standard be counted?
> Otherwise its not a primary standard.

Can you have a Cs under zero acceleration and at zero temperature, the 
only conditions for which the second is defined? Since most metric units 
are derived from the definition of the second, are any "primary 
standards," in your opinion?



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