How many people know which is bigger – an ounce of water or a fluid ounce of water.
The imperial gallon (160 fluid ounces) was defined in 1824 as being the volume of 10 pounds of water (160 ounces) at 62 °F (17 °C). If we are willing to ignore the expansion of water between 4 °C and 17 °C, then one imperial fluid ounce of water has a mass of one avoirdupois ounce. The US fluid ounce is 4.1% larger than its imperial counterpart (but there are 16 US fluid ounces and a US gallon, not 20 as in imperial measure). What about a fluid ounce of petrol (gasoline) compared to an ounce of petrol? Given that the specific gravity of petrol is about 0.755, an imperial fluid ounce of petrol has a mass of about 0.75 avoirdupois ounces and a US fluid ounce has a mass of about 0.80 avoirdupois ounces. Now think about mercury which has a specific gravity of 13.6. A fluid ounce of mercury would have a mass of between 13.6 and 14 avoirdupois ounces (I am not going to work out the exact amount). The US dry pint (The imperial dry pint was identical to the imperial fluid pint) adds to the confusion. The US dry pint has a volume of about 550 mL which is almost the same as the imperial pint (568 mL) and a lot more than the US fluid pint (473 mL). I think that this little discourse shows the stupidity of having a unit of capacity and a unit of mass with almost the same name and also the stupidity of the British and the Americans having units of capacity that have the same names, but different sizes. From: USMA [mailto:[email protected]] On Behalf Of Paul Trusten Sent: 02 November 2019 22:33 Cc: [email protected] Subject: [USMA 1258] Re: Delta faucet Yet, the very next command in the commercial is in “ounces.” A good argument CAN be made that many users of legacy units don’t have a grasp on the difference between ounces and fluid ounces! Product labeling is clear, but understanding is not! Yes, the participant and the viewers know that we are talking about 35 fluid ounces, since the subject is water. On Nov 2, 2019, at 17:14, bill roush <[email protected]> wrote: In an ad, the announcer says, "hey Google, tell Delta to fill150ml from faucet". https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fyoutu.be%2FSdKgJQQC7Pw&data=02%7C01%7Cusma%40lists.colostate.edu%7C3f413eb9f88d40ddf87008d7607f90f2%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C637083973318306335&sdata=sHi0bkAI%2Fh%2BWp9bb8iWl%2F%2FD0zfjCe4SiUladnPjF%2BYw%3D&reserved=0 <https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fyoutu.be%2FSdKgJQQC7Pw&data=02%7C01%7Cusma%40lists.colostate.edu%7C3f413eb9f88d40ddf87008d7607f90f2%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C637083973318306335&sdata=sHi0bkAI%2Fh%2BWp9bb8iWl%2F%2FD0zfjCe4SiUladnPjF%2BYw%3D&reserved=0> _______________________________________________ USMA mailing list [email protected] https://lists.colostate.edu/cgi-bin/mailman/listinfo/usma
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