what are ounces based upon and why?
464142
The ounce is the name for a number of different units of mass (oz), and also of two units of fluid volume (fl oz) and of one unit of force, the ounce-force (ozf). See Imperial system of units and U.S. customary units for more about the frameworks within which these units are defined.\n\navoirdupois ounce defined by the avoirdupois system of mass (see pound (mass)). There are 16 ounces in the avoirdupois pound. The avoirdupois ounce is approximately 28.35 gram. \ntroy ounce defined by the troy system of mass. In troy weight, there are 12 ounces in a pound, and a troy pound is 5760 grains (about 373.24 g), rather than 7000 (about 453.59 g). Note: at roughly 31.104 g, the troy ounce is about 10 per cent more than the more-common avoirdupois ounce. These troy ounces are now used only when weighing precious metals like gold, platinum and silver. One ounce of gold is always 31.1 g. "Maria Theresa Ounce" was once introduced in Ethiopia and some European countries, which was equal to 31.1025 g. \napothecaries' ounce defined by the now-obsolete apothecaries' system of mass. This ounce was the same size as the troy ounce, and its symbol was ℥ (U+2125). \nThe fluid ounce unit of volume also exists in the two versions of 28.41 ml (Imperial) and 29.57 ml (U.S.). \nThe ounce-force (see pound-force) is the force exerted by a mass of 1 oz avoirdupois at the standard acceleration of gravity, usually borrowing the value which is official for defining kilograms-force, 9.80665 m/s². Thus 1 ozf is approximately 278.0 millinewton. \nThe Dutch term ons is a unit of mass that is considerably more, 100 g, a redefinition adopted with the introduction of the metric system together with a redefinition of the Dutch pond as 1 kg. (Though the ons of 100 g remains in informal usage, this pond as a kilogram has fallen by the wayside, replaced by the metric pound of 500 g adopted in other countries.)
1186953
1 fluid ounce (2 tablespoons)
625405
Gold is measured in troy ounces so\n\n1 troy ounce = 31.1034768 grams
61142
I believe it is 28.4ml equals one ounce ... of course, this is a liquid ( water ) measurement ... it is estimated that 30ml = 1 ounce
42926
Explain that pounds are divided into smaller parts called ounces and 16 ounces equal a pound.\n\nu'll get more help here:\nhttp://www.math.com/parents/articles/grocerymath.html
657402
31.1034768 g\n\nFrom attached article:\nA troy ounce, the only currently used unit of the system, is 480 grains, somewhat heavier than an avoirdupois ounce (437.5 grains). A grain is exactly 64.798 91 mg, hence one troy ounce is exactly 31.103 476 8 g, about 10 per cent more than the avoirdupois ounce, which is exactly 28.349 523 125 g.
987831
1 gallon= 128 fluid ounces\n1 kilogram= 2.25 lbs\n1 ounce= about 28 grams
946966
Oz is a small quantity no doubt,but it is not so small like a tiny drop of watr.But there is no doubt that perfumes are very costly because the cost of prodution is very high.
69568
None, unless you pour something into it, then it is a measure of 1.5 oz. \n\nHope it is something yummy.
473571
1 ounce of silver = 28.3495231 grams
609998
1 ounce = 28.3495231 gram\n1 gram = 0.0352739619 ounce
660865
ok....\n\n1 ounce = 2 tablespoonsn so\n10 ounces = 20 tablespoons
622869
It depends on the size of each of these.  It would be best to buy a bag of each, squeeze each one and measure the number of ounces and get a good average for each kind.
751283
Karat Juice (like 24 Karat)\n\nMellow Geolo (the name "gold" comes from the Old English word geolo (yellow))
105116
The English system of measurement grew out of the creative way that people measured for themselves.  Familiar objects and parts of the body were used as measuring devices.  For example, people measured shorter distances on the ground with their feet.\n\nWeight:\n\n16 ounces (oz) = 1 pound (lb)\n2000 lb = 1 ton\n\n \nCapacity:\n\n3 teaspoons (tsp) = 1 tablespoon (tbsp)\n 16 tbsp = 1 cup (c)\n8 ounces (oz) = 1 c\n2 c = 1 pint (pt)\n2 pt = 1 quart (qt)\n4 qt = 1 gallon (gal\n\n\nMetric system of weights and measures planned in France and adopted there in 1799; it has since been adopted by most of the technologically developed countries of the world. It is based on a unit of length, called the meter (m), and a unit of mass, called the kilogram (kg). It is easier to convert from one unit to another since it is in power of 10.\n\nEx.  10 cm = 1 dm, 10 dm = 1 m,  100 cm= 1 m\n\nMetric to English\nLength:\n\n1 mm = 0.04 in\n1 cm = 0.39 in\n 1 m = 39.37 in = 3.28 ft\n1 m = 1.09 yd\n1 km = 0.62 mi\n\nWeight:\n\n1 g = 0.035 oz\n1 l = 1.057 qt\n\n\nCapacity:\n\n1 ml = .2 tsp\n1 l = 1.057 qt\n\n\nEnglish to Metric \nLength:\n\n1 in = 2.54 cm\n1 ft = 30.48 cm = 0.305 m\n 1 yd = 0.914 m\n1 mi = 1.609 km\n\n\nWeight:\n\n1 oz = 28.350 g\n1 lb = 0.453 kg\n\n\nCapacity:\n\n1 tsp = 5 ml\n1 c = 236 ml\n1 qt = 0.946 l\n1 gal = 3.785 l\n\n\nLength:\n\n12 inches (in) = 1 foot (ft)\n3 feet  = 1 yard (yd)\n 5280 feet = 1 mile (mi)
296385
10 pounds of feathers are heavier than 10 pounds of gold!  \n\nHowever, an ounce of gold is heavier than an ounce of feathers.\n\nThis is a pretty cool riddle.  Precious metals are measured using the Troy system (instead of our regular system).  This system has 12 Troy ounces to the Troy pound instead of 16 regular ounces to the regular pound.  The Troy ounce is a 10% larger than the regular ounce, but the regular pound has 25% more ounces so the net result is that the regular pound weighs more.
6536
No one person invented the Metric System, but it dates to 18th century France.  You're right, we do already have a system, called Standard that has pounds, ounces and so on.  The reason that Metric is prefered (and indeed used by almost all developed nations except the United States) is simple:  How many ounces are in a gallon? How many square feet are in an acre?  How many inches are in a yard?  These questions yeild the following answers; .0078, 2.29 x 10^-5 and 36, not easy numbers to work with.  With Metric, the major marking points are 10, 100, 1000, and so on.  The modern metric system also uses extremely sophisticated ways of getting precise measurements based on natural objects (the size of the earth, the weight of water and so on).