[time-nuts] Re: What everyday uses are there for accurate clocks?

[Lux, Jim]

On 11/29/22 2:02 PM, Andy Talbot wrote:
> The volt isn’t an SI unit. The amp is, and volts will be derived from 
> amps via power which itself comes from mass, length and time.
>
The volt is not a base SI unit, true, but the SI definition depends on 
the Josephson constant.


The amp is defined in terms of charge on an electron 9defined as 
1.602... E-19 coulombs) and electrons per second (which is back to 
accurate time message).




> On Tue, 29 Nov 2022 at 21:59, Lux, Jim via time-nuts 
> <time-nuts at lists.febo.com> wrote:
>
>     On 11/29/22 11:36 AM, Andy Talbot via time-nuts wrote:
>     > The kilogram was sorted a couple of years ago.
>     > It is now defined in terms of teh Planc constant which has been
>     declared as
>     > a fixed value
>     > All the other SI units are defined the same way now - by fixing the
>     > physical constants  = and all referring back to the second.
>     >
>     >
>     https://physicsworld.com/a/new-definition-of-the-kilogram-comes-into-force/#:~:text=The%20kilogram%20is%20now%20defined,such%20as%20the%20Kibble%20balance
>     > .
>     >
>     > Andy
>     > www.g4jnt.com <http://www.g4jnt.com>
>
>
>     Isn't the volt defined in terms of a Josephson junction, and
>     frequency,
>     which is in terms of time, again.
>
>
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> -- 
> Andy (out keeping fit)