Martin, I had forgotten, but there can be no mistake or misunderstanding when it is repeated in a series of numbers. But as i said it may already be in use in some countries. I've seen desktop calculators use the apostrophe that way.
I would think that for the very few that use that method of angular measurement they could stop and just use decimal degrees or radians. Is the apostrophe accepted as a symbol in SI? Jerry ________________________________ From: Martin Vlietstra <[email protected]> To: U.S. Metric Association <[email protected]> Sent: Saturday, January 31, 2009 3:56:26 AM Subject: [USMA:42682] Re: REALLY using the SI The single apostrophe is the symbol for seconds of arc. ________________________________ From:[email protected] [mailto:[email protected]] On Behalf Of Jeremiah MacGregor Sent: 31 January 2009 04:43 To: U.S. Metric Association Subject: [USMA:42660] Re: REALLY using the SI Mark, Don't some disciplines use an apostrophe to separate numbers into groups? 123'456'789.123'456'789 Why not use it everywhere? I don't like commons or points as number separators. They can to easily be confused with another. I prefer the point as a decimal marker only because I'm use to it. But when encountered, I have no problem with the comma. I prefer also to see a zero before a decimal number less then 1. Jerry ________________________________ From:Mark Simon <markjames simon @gmail.com> To: U.S. Metric Association <[email protected]> Sent: Wednesday, January 28, 2009 12:16:08 PM Subject: [USMA:42623] Re: REALLY using the SI With regard to semantics, I would like to mention the use of the comma as decimal separator. I am sure that most of us are aware that comma "," is used to separate integers from the tenths in Europe as opposed to the period "." which is used in USA . Thousands, Millions, etc. are separated by a space as opposed to the comma. Mechtly has separated the thousand in the European manner. When I purchased nuts for my honda recently it was labeled as: M8-1.25, but the bolts I used to test the thread were labeled as: M8-1,25. Does SI specify the punctuation as to the decimal and thousands separators? On 1/27/09, [email protected] <[email protected]> wrote: > > Aaron, > > Agreed, the ton is a unit of mass. Eventually, I hope, > a "metric ton," defined as exactly 1 000 kilograms, will be known simply as > a ton, identical to a tonne in some languages. > > I favor this use of the word "ton" ;not adoption of the Mg. > > Is this your first posting here? Welcome! > > Gene. > > > > ---- Original message ---- >>Date: Mon, 26 Jan 2009 12:39:25 -0700 >>From: Aaron Harper <[email protected]> >>Subject: [USMA:42608] Re: REALLY using the SI >>To: "U.S. Metric Association" <[email protected]> >>Cc: "U.S. Metric Association" <[email protected]> >> >> I can't let this one go without making a comment. >> >> Ships are measured in tons (units of Mass) of water >> displaced by the ship. Even though a given tonnage >> ship displaces a specific volume of water, this is >> not a volume mesurement. >> >> Refrigeration unit capacities are rated by the >> amount (again units of Mass) of ice created (or >> frozen) per unit of time. Usually, here in the USA , >> this unit is presently given in tons. It is not a >> measure of the energy or heat required. >> >> Respectfully, >> >> Aaron Harper > >
