On Wednesday 20 May 2009, der Mouse wrote: >>> A ton of cooling is 12 Kbtu, about the heat of crystallization of >>> one ton of water, per hour. >>> >>>> Why do engineers use so many whacky units? >>> >>> [...], tradition and convenience. >> >> Good excuses for the masses. Not so good for engineering, which >> depends on precise communication. > >Which measuring air conditioning capacities in tons provides. Just >because it's disorienting to those who are acquainted with only other >meanings of the word doesn't make it any less precise. It's not even >ambiguous, since air conditioning capacity doesn't have units of >weight. You might as well ask why motor power is measured in >horsepower - that's another historical unit that's cryptic and baffling >to the uninitiated, but is perfectly good to those in the industry.
And the unit called a horsepower is a complete unit also, as I believe its defined as lifting 550 pounds 1 foot in 1 second. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) The NRA is offering FREE Associate memberships to anyone who wants them. <https://www.nrahq.org/nrabonus/accept-membership.asp> Now KEN and BARBIE are PERMANENTLY ADDICTED to MIND-ALTERING DRUGS ... _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
