M R wrote:
>
> Jim Frysinger wrote
> "With those seven base units and their derived units
> you can measure just about everything but true love."
> The unit of love is $/? (euro). The more you spend,
> the more you love - just kidding.
>
> If 'day' is a SI unit, then its fantastic as we can
> use deciday, centiday, milliday, etc. MS-Office Excel
> and Star-Office Calc gives function to measure decimal
> day.
>
> Am I right.
Madan, you're a cynic! (grin)
As for prefixing "day", I asked our national representative on the CCU
about something similar some time ago. Though there is nothing explicit
about prefixing the "non-SI units authorized for use with the SI", he
said that the SI community (CGPM, CIPM, BIPM, etc.) did not favor this
practice at all, with a few exceptions. Liter, tonne (metric ton),
neper, and bel are often prefixed but not the time or angle units. The
second, a base unit, is often prefixed, of course.
I have adopted the practice in my labs of periodically reminding
students on the time remaining, in order to help them budget their time
and to keep from getting bogged down. When I used to announce the time
remaining in hours and minutes, I was "not heard". Then I started
announcing the number of kiloseconds remaining; all talking in the lab
ceases immediately and everyone looks at the clock. Mission
accomplished! Also, it usually leaves a grin on the students' faces.
Jim
