Originally Posted by
cparekh
Has anyone else ever cared that an ounce is a traditional unit of weight? The avoirdupois ounce, the unit commonly used in the United States, is 1/16 pound or about 28.3495 grams.
A fluid ounce is a traditional unit of liquid volume, called the fluid ounce to avoid confusion with the weight ounce. In the U. S. customary system there are 16 fluid ounces in a pint, so each fluid ounce represents 1.804 687 cubic inches or 29.573 531 milliliters.
The only link between the two (besides the name) is that one British (not US) fluid ounce of water weighs exactly one ounce at 25 degrees C and 1 ATM of pressure.
Whoa, there, Mr Wizard!
We just got the TSA HQ to recognise that 3.0 is not equal to 3.4, and now you want to bring in numbers with six decimal places?? And British fluid ounces vs US fluid ounces?? And temperature and pressure?? Bob's head would explode.
You're absolutely right, of course, except maybe where you said, "... to avoid confusion ..." since the TSA actively encourages that confusion. Their unchallenged authority allows them to ignore mere physics, chemistry, mathematics and the straightforward interpretation of the English language.
On PV,
Blogdad Bob has admitted that weight and volume are different, but it's all just too hard
:
Originally Posted by Blogger Bob
Some people have asked why we don’t convert the net weight of the toothpaste to volume since they are different. Good question. The 3.4 container/volume rule was created to make it simple and streamlined for both passengers and our officers. As you could imagine, taking weight into consideration would be a wrench in the spokes. I’m sure the public doesn’t want our officers using scales or conversion charts, etc.