Why do we want to use SI? So we don't get bogged down in the following types of discussion.
Duncan wrote: > The UK gallon has a mass of 10 lb. avd. = 160 ounces (at 60oF?). > [40 ounces to a UK quart] ASSUMING THE FLUID IS WATER: Since a quart is a quarter of a gallon and a pint is half a quart, then a pint is one eighth of a gallon. This leads directly to: one eighth of a gallon has a mass of one eighth of 160 ounces, so that 1 pint has a mass of 20 ounces. > ... there is a saying "the pint's a pound, the world around". > From this, we get a fluid ounce as 1/16th of a pint. No we don't! From this (above) we get "a pint of water has a mass of one pound" (16 ounces of mass). It doesn't tell us anything about how many fluid ounces there are in a pint. There seems to be a confusion here between the fluid ounce (a unit of volume) and the mass ounce (a mass unit). They're not the same thing. Besides, the conclusion immediately above, that a pint has a mass of16 ounces, is inconsistent with the previous conclusion, that a pint has a mass of 20 ounces. > 'the pint's a pound' is not exactly so. It's not even close. Regards, Bill Hooper college physics teacher (retired), USA (Florida) +-+-+-+-+-+-+-+-+-+-+-+ Do It Easy, Do It Metric! +-+-+-+-+-+-+-+-+-+-+-+
