28,000 square feet x (8.5 inch / 12 inch per foot) = 19,833.3 cubic ft
19,833.3 cubic ft x 62.38 pounds per cubic foot = 1,237,203 pounds
1,237,203 pounds / 2,000 pounds per ton = 618.6 tons
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Inches of water x 0.03613 equals pounds per square inch (psi).
-- 1 square inch weighs nothing, since its volume is zero. -- If the square inch is one end of a vertical column of water, then the column weighs about [ 5pounds 31/3ounces ] for each 12-ft of its height.
10" Water Column equals about .4 Pounds per Square Inch or 0.36127291827412783psi exactly.
A dime weighs about 2.268 grams, and water weighs about 1 gram per milliliter. So, a 16.9 FL OZ bottle of water is about 500 grams. Therefore, you would need around 220 dimes to fill a 16.9 FL OZ bottle of water. But hey, who's counting?
1 gallon = 231 cubic inches1,728 cubic inches = 1 cubic foot2,500 gallons = 577,500 cubic inchesVolume = (850 x 144) x depth = 577,500 cubic inchesDepth = 577,500 / (850 x 144) = 4.718 inches(rounded)