On Monday, June 24, 2013 21:29:57 JohnAltounji wrote:
Not true in physics classes, at least mine.
Me too, my physics classroom had a 10 m distance marked to the diffraction
grating, kilogram masses, and so on.
Pierre
--
lo ponse be lo mruli ku po'o cu ga'ezga roda lo ka dinko
John (Altounji),
I did not realize that your *physics classes* reached down into elementary
school, where most pupils have had intense immersion in only units of
measurement outside the SI, even if their teachers try to introduce metric
units.
From:
Hello Everyone:
I am writing an article about the benefits of using SI units in Agriculture.
I need concrete, real world examples of easy calculations such water needed
per square meter or any other interesting, persuasive examples.
I know I have seen many examples associated with different
all looks incredibly easy:
Comparison of Area units
Unit
SI
1 ca 1 m2
1 a 100 m2
1 ha 10,000 m2
100 ha 1 km2
(from http://en.wikipedia.org/wiki/Hectare#Are)
vs.
One acre equals 0.0015625 square miles, 4,840 square yards, 43,560 square
feet[1] or about 4,047 square metres (0.405 hectares)
The hectare is frequently used for area of fields in agriculture. The are
either alone or with any other prefix is rarely used. Prefixes less than one
seem extremely confusing with the are (much as with the tonne) and IMO should
not be used. My recommendation for increasing areas, square
I found the following for watering your lawn:
4 mm of water per day. This is equivalents to 4 L/m2. This is quite easy:
for every mm of rain we have 1 L/m2.
Found at the following French site:
http://www.deco.fr/jardin-jardinage/travaux-entretien/arroser-la-pelouse/
John
