Wierd Units

[Dan M]

I have a units conversion spreadsheet that contains several units with the prefix "AB".

abamperes

abfarads

abhenries

abohms

abvolts

....etc.

The conversion values are such that it can't represent a constant (like kilo or milli).

For example 1 abvolt = 10^(-8) volts.

But 1 abcoulomb = 10 coulombs?!?!?!?

Did Allen Bradley come up with there own units to protect trade secrets?

-Dan M

[Flux]

These seem to be the absolute cgs units.

The absolute cgs unit of emf is 10^(-8) volts.

The absolute amp is 10A, which ties up with the Ab coulomb. I dont' know how the Henries and Ohms fit in as we used the International standard units that were defined from the resistance of a column of Mercury etc.

Hope this helps.

Flux

[alcul8r]

This definately belongs under rants.

According to

http://whatis.techtarget.com/definition/0,,sid9_gci551470,00.html

these are metric redifinitions of our units.  Only it called them cgs, or centimeter gram second instead of metric.

Really weird, I had not known there was any move afoot to redefine.  What good is 10 to the -8 volts anyway, unless you are making intracellular measurements or something like that.

[wooferhound]

What about these weird watt measurements

yoctowatt

zeptowatt

yottawatt

and did you know that the human brain uses about 40 watts when under a load

all of this information is on this page

http://en.wikipedia.org/wiki/Orders_of_magnitude_(power)

[wooferhound]

Looks like you'll have to Copy and Paste that link

http://en.wikipedia.org/wiki/Orders_of_magnitude_(power)

[kww]

"and did you know that the human brain uses about 40 watts when under a load"

Sounds rather dim. :-)

[JW]

the ab-prefixes must have somthing to do with the spreadsheet. all the values are correct, henrys, volts, amps, etc.

JW

[dhagerty]

So if I carried a carbon pile in my pocket, would it be a stress reducer? :-)

(naw, I didn't think so)

[Dan M]

"Sounds rather dim. :-)"

Not if you're using compact florescents!

[finnsawyer]

Define "load'.  Sexual fantasies or deep thought?  Anyway, if you want to lose weight use your brain?

[Dan M]

Looking at the high order prefixes it gets me wondering.

2^10 is close to 10^3, but isn't the same.

Since in computer-speak, a kilobyte is not 1000 bytes, but rather 1024 bytes,

and a megabyte is not 1000k but rather 1024k,

and so on.

This makes a terrabyte very close to 1.1 trillion bytes, or a discrepancy of 10%.

So in a few (probably very few) years when hard drives are expressed in terrabytes, will a terrabyte be 2^40 bytes or 10^12 bytes?

[newguy]

 1-farad capacitor can store one coulomb (coo-lomb) of charge at 1 volt. A coulomb is 6.25e18 (6.25 * 10^18, or 6.25 billion billion) electrons

[JW]

Look, DUDES'

 i realy enjoy this site for what it is, practical..

Agreed.... 6,280,000,000,000,000,000 is ALOT of electrons...

 ok, so how many (cuu-loomeeb)'s is in a joule of 'M'-ergy,   likewise a capacitor at say, 1 FARAD., can store "so-many" electrons, 'if you will'[ whatever you were babbling back there, as far as numbers go]. Smiles again, and trys to convinice you, he is still kidding.

Maybe this will help-

 1- FARAD = 1 F   ...a 1 farad CAPACITOR is connected to a 1-volt supply will store- 6,280,000,000,000,000,000 (6.28 x 10 to the 18teenth'power) ELECTRONS!. So, does the [^symbol] mean 10^18 = ten to the eithight power? or What?

And for the guy with the carbon-pile in his pocket, You'd be well advised to never run anymore than 12volts, at [ever more than] 2.0 amp's, in to that thing, while its in your pocket.     ?

JW

 

[JW]

Well,

 since this thread on weird units, I have done some additional researsh on the [^ symbol], it appears this is the 'upper case' greek letter for LAMBDA. tHE 'lower case letter' would be something that looks like a 2... So, how are us, un-physists suposed to equate this, "as" ^ = to the such and such power??? anyone?

Ya, we're pretty-much practical here.. ;0

JW