Liquid Quart vs. Solid QuartDate: 04/27/2001 at 19:24:12 From: James L. Erbes Subject: Liquid quart versus solid quart Why does a liquid quart consist of 57.75 cubic inches, whereas a solid quart consists of 67.2 cubic inches? Thanks, James Date: 04/28/2001 at 22:55:26 From: Doctor Peterson Subject: Re: Liquid quart versus solid quart. Hi, James. "Why" questions in the area of units (or in history in general) don't tend to have satisfying answers, but our FAQ includes a link to a good site where such questions are answered as well as anywhere I know: How Many? - Russ Rowlett http://www.unc.edu/~rowlett/units/ Look up "quart" and from there go to "gallon." You'll find that a likely explanation is that solids, such as grain, can be heaped up, while liquids can't. A dry gallon is a "heaping pailful," while a liquid gallon is only full to the brim. Old units were very practical, while modern units are more consistent. - Doctor Peterson, The Math Forum http://mathforum.org/dr.math/ |
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