(1) You mean a US gallon — an Imperial gallon weighs 10 pounds.
(2) I thought the figure was supposed to be 8 pounds exactly.
(3) It depends on water purity and temperature — the 10-pound figure is for an Imperial gallon of pure water at 70°F...
Incidentally, a litre of pure water at 4°C weighs 1 kilogram — that's how the gramme was originally defined...
According to Perry's, the desnity of water is closer to 8.32 lb/gal (US) at standard room temperature. I myself use 8 lb/gal when doing rough estimates.
The kilogram (and thus all units of mass) are currently defined by a particular piece of metal (lead?) housed in the institute of standards in France. Interestingly, mass is the only physical dimension that is still measured using a macroscopic object.
- Alchemy -
-------------------- Thinking about New England / missing old Japan
okay, so if people are thinking that a gallon should be 8lbs rather than 8.34lbs, is it possible that the .34lbs could account for the container it is placed in? I know you're surposed to subtract the weight of the container, but maybe whom ever came up with this amount didn't. I don't know, just a thought!
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And in most bars in the United States, a pint is only 14 ounces. The 14 ounce pint glass is both strong, and is fairly cheap to produce. A strong 16 ounce glass cost too much to produce and sell cheap. The cheap 16 ounce glasses break easily. Steal a "pint glass" from a bar and measure it someday.
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The Holly and the Limey
The Red and the Green Stamps
quote:Originally posted by DataAngel, We Have Heard Is High: [QB]To quote my mom "A pint's a pound the world around."