One cubic foot of water weighs 62.42796 pounds. The volume of a 10 foot long 6 inch diameter cylinder is 1.96350 cubic feet, thus it displaces 122.5770 pounds of water when fully submerged.
As I do not know the wall thickness of the PVC pipe and caps you plan to use I cannot calculate its weight. However if I assume for illustration purposes that the pipe weighs 5 pounds per foot and each cap weighs 2 pounds, then the capped pipe weighs 54 pounds. Subtracting this would mean that the capped pipe will support 68.5770 pounds when fully submerged.
Do not trust this final number because as I stated I guessed at the weight of the PVC components so that I could illustrate the calculation. Determine the actual weight of the PVC components you are using yourself and recalculate that final subtraction. Also for safety you should provide a margin of at least 10% on your final values to allow for anything that may not have been accounted for.
180/62.5 = 2.88 cubic feet
Yes, legs and feet are stronger, as they are able to support your body weight, whereas, your arms are not.
7,500 gallons of water equates to 1,002.604 cubic feet. This much water would have a weight of about 62,625 pounds.
Approximately 1,419.34 pounds @8.34 pounds per US gallon.
Since we don't know the weight of the cube itself, we can only tell the weight of the water. Since the volume of a 3-foot cube is 27 cubic feet, we find that 27 cubic feet is equal to 202 gallons. Because one gallon of water weighs about 8.35 pounds, we multiply 202 x 8.35 for a result of 1,686.7 pounds for the water alone.
8.8 gallons of water.
It depends what it is made of and the thickness of the material. It also depends upon the distribution of weight in the box. For example a box made of card will not be able to support much weight whilst a box made of aluminium will be able to support a lot more weight.
172.3 feet
The 260 feet of water: at that depth, there is the weight of the water and the atmosphere on top of it.
200 cubic feet of water weighs about 12,462.5 pounds or 6.23 tons.
Nothing.480 square feet is a measure of area - not of volume. An area cannot have mass and therefore no weight.
Approximately 1,620.2 pounds.
That is 18,041.403 pounds
Approximately 102 pounds for 1.63 cubic feet of water (12.2 US gallons).
The weight of 2.25 cubic feet of water is approx 4495 pounds-force (lbf).
If the weight is 62.5, then it weighs 62.5
yes.