[time-nuts] 15 ns vs. 15 nS

John Day johnday at wordsnimages.com
Tue May 22 07:42:57 EDT 2007


At 04:05 AM 5/22/2007, Rob Kimberley wrote:
>As Seconds are a fundamental unit of the SI system, shouldn't the "S" be
>upper case?

Of seven SI 'base units' only two - K for thermodynamic temperature 
and A for electrical current are capitalised. On the basis of your 
suggestion we would need to campaign for a change in 5 units, not just one.

John


>Over to you fellow "nuts".
>
>Rob Kimberley
>
>-----Original Message-----
>From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>Behalf Of James Maynard
>Sent: 22 May 2007 08:26
>To: Discussion of precise time and frequency measurement
>Subject: [time-nuts] 15 ns vs. 15 nS
>
>Didier Juges wrote:
> > Sorry, it's not 15nS rms, it's 15nS at 1 sigma.
> >
> > Didier KO4BB
> >
> >
>A long s we are being pedantic:
>15 ns = 15 nanoseconds, but 15 nS = 15 nanosiemens.
>
>I am sure in the time-nuts list, we are concerned with nanoseconds, not
>nanosiemens!
>
>
>
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