On Mar 2, 2006, at 7:07 AM, [EMAIL PROTECTED] wrote:



-----Original Message-----
From: hohlrauml6d

Paul is often a little sloppy with his terminology. He forgets to use the proper units. The pulse duration is not .028 ms, it's .028 s.

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Damn, I didn't finish the post. Why does the brain degrade so quickly after reaching 50?

I meant to add that Paul meant 1.05 Watt-seconds, a measure of energy equal to 1.05 Joule. It is usually considered polite to capitalize the units which represent a name.

Surprisingly to many, this is not so. When a scientist's name reaches the exalted state of being used as a unit, then when spelled out in that usage it is no longer capitalized. This non- capitalization rule is in itself an honor, designating the use of an international standard. However, the name is still capitalized in the abbreviation. Consider the following SI units and their abbreviations:

hertz  Hz
newton N
Pascal Pa
joule J
watt W
coulomb C
volt V
ohm (capital omega)
siemens S
farad F
tesla T
weber Wb
henry H
becquerel Bq
gray Gy
sievert Sv

and some ordinary SI units:

lumen lm
lux lx
radian rad
steradian sr

Horace Heffner

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