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
