I disagree with the NIST in the case of kL because L is used widely and well
known in the public sector. Are you suggesting that mm^3 be used instead of
L?
Stan Doore
----- Original Message -----
From: John M. Steele
To: U.S. Metric Association
Sent: Wednesday, April 08, 2009 8:09 AM
Subject: [USMA:44476] Re: FPLA 2010
*It is harder to visual than 1 m³
*It uses a prefixed, incoherent "special name" unit when a coherent
unit fits better.
*NIST SP811 says you shouldn't use prefixes greater than 1 with the
liter.
Would you buy 1 mt of meat instead of 1 kg? The tonne only makes sense
for amounts larger than 1000 kg, and the liter only for amounts less than 1 m³.
Among the other "special names", I notice the are is now deprecated when
standing alone and is only accepted as the hectare. It probably only makes
sense between 1 ha and 100 ha, then you think about square kilometers. (Some
relaxation of rules OK in tables to retain same units through a column)
--- On Wed, 4/8/09, STANLEY DOORE <[email protected]> wrote:
From: STANLEY DOORE <[email protected]>
Subject: [USMA:44474] Re: FPLA 2010
To: "U.S. Metric Association" <[email protected]>
Date: Wednesday, April 8, 2009, 7:35 AM
The kL is the same size as a cubic metre. So what's the problem?
The litre is a very commonly used volume by virtually all people.
Stan Doore
----- Original Message -----
From: Bill Hooper
To: U.S. Metric Association
Sent: Tuesday, April 07, 2009 9:58 PM
Subject: [USMA:44468] Re: FPLA 2010
On Apr 6 , at 8:18 AM, John M. Steele wrote:
I know you love the kiloliter, but I personally find the cubic
meter a lot easier to visual. You know, it's about 1 m x 1 m x 1 m. :)
--- On Mon, 4/6/09, STANLEY DOORE <[email protected]> wrote:
To go along with putting L (liter) first, (but) I suggest using the kL
(kiloliter)
in place of a cubic meter in non-engineering (public) usage. kL is much easier
to use and is more understandable by the public.I go along with John on this.
Stanley may think of a kilotitre to be easier to visualize, but I don't. I keep
trying to visualize a thousand one-litre bottles of a beverage (or five hundred
2 L bottles, etc.). None of that works for me.
But a cube 1 m long and 1 m wide and 1 m high is easy to visualize.
Before I retired, I concluded that my nice big desk in my lab occupied a space
very close to a cubic metre. It was a bit longer than 1 m but a bit shorter
than 1 m, and had a width of just about 1 m, so it came out quite close to 1
m^3.
I used that as my example of a cubic metre for students in my
metric and in my physics classes.
Bill Hooper
1810 mm tall
Fernandina Beach, Florida, USA
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SImplification Begins With SI.
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