None.
An ounce is a measure of mass, which, if the quality of silver (purity and what substance it is mixed with) is known precisely, can be converted to the volume of silver. A foot is a measure of distance and that cannot be converted to either mass or volume - it makes no sense to even try.
Distance and weight don't compare at all.
14 silver dimes equal just a little more than 1 troy oz. Each coin has .07234 oz of pure silver.
1 troy ounce of silver is 480 grains.
31.1 troy
14 silver dimes equal just little more than 1 troy oz. Each coin has .07234 oz of pure silver.
31.1 grams.
Unknown
The silver content of a 1 oz Silver Chinese Panda is...1 oz of silver.
1 troy oz of silver is 31.1 (31.1034768) grams.
14oz
1 troy ounce is 31,100 mg
silver dollars should all be 1 ounce give or take a few grams