On 2 February 2011 13:47, Daniel R. Tobias <[email protected]> wrote:
> On 2 Feb 2011 at 8:32, Gerard Ashton wrote:
>
>> - the SI second is part of a coherent system of units and redefinition
>> of the second would
>> disturb the definition of most other units
>
> You could have multiple types of seconds, like you have troy and
> avoirdupois ounces, and U.S. and imperial gallons.
>
> NASA is already using a Martian second, based on subdividing the
> solar day of Mars, that is a different length from the SI or Earth
> rotation seconds.
But are you disagreeing with the statement as written? Its precise
("SI second"). Remember my instruction to not imply anything beyond
the statement itself? Nevertheless, the point is useful, and could
imply a statement:
- the terms seconds, minutes, hours and days are overloaded
Stephen
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