*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 ========================== SImplification Begins With SI. ==========================
