At 22:20 -0800 02/01/30, Bill Potts wrote:
> > Do you see what I mean? Is there such unit as dot/cm in ISO or SI? Just
>the fact that it uses cm does not make it a valid unit of measurement!
To complement my previous message, I should have given the definition
of "(measurable) quantity" :
Quote :
(measurable) quantity
"attribute of a phenomenon, body or substance that may be
distinguished qualitatively and determined quantitatively.
Notes :
1 - The term quantity may refer to a quantity in a general sense [see
example a)] or to a "particular quantity" [see example b)]
Examples
a) quantities in a general sense : length, time, mass,
temperature, electrical resistance, amount-of-substance concentration.
b) particular quantities :
- length of a given rod
- electrical resistance of a given specimen of wire
- amount-of-substance concentration of ethanol in a given
sample of wine.
2 - Quantities that can be placed in order of magnitude relative to
one another are called "quantities of the same kind".
3 - quantities of the same kind may be be grouped together into
"categories of quantities", for example :
- work, heat, energy,
- thickness, circumference, wavelength.
4 - Symbols for quantities are given in ISO 31
Unquote
The book giving these definitions was drafted after the product of a
working group of experts from BIPM, ISO, IEC, IUPAC, IUPAP, IFCC,
OIML.
Now given all of that, I am not sure wether "liter per flush" is a
unit of measurement.
BTW, my dual-button toilet gives 4 l/fl or 8 l/fl depending on the
button you activate.
Louis
