how many gallons of water will a tank that is 5 foot by 4 foot by 8 foot hold
A 15 cubic foot tank will hold a maximum of about 112.2 gallons of water.
A square foot is not going to hold any water, because it's flat. You need a cubic measurements for volume.
141.06 gallons
700 gallons
20,000 tons
as big as it needs to be to hold its weight
When made out of cardboard? About ten kilos.
About 220 lb.
The weight that plexiglass can hold per square foot will depend on the thickness of the sheet. As a general reference, 1/8" thick plexiglass can typically hold up to 15 pounds per square foot, while 1/4" thick plexiglass can hold around 60 pounds per square foot. For greater load-bearing capacities, thicker plexiglass sheets or additional support structures may be needed.
A square foot of Plexiglas can hold no water. It is a flat sheet. A cube of Plexiglas would be needed.
A rock over is when someone can not reach a hold so they put there foot high and put all there weight on there high foot and put of it to get to another hold
Depends on the structural integrity of the deck.
The weight a floor can hold depends on its construction and materials. Typically, residential floors can support around 40 pounds per square foot, while commercial floors can hold more, up to 100 pounds per square foot. It's important to consult a structural engineer for specific weight capacity calculations.
The answer will depend on 4 inch slab of what material!
Someone said "not much" and went on to break the stick - on the thin edge, the 3/4" part. (A 1x2 is actually 3/4" x 1 /12") Yep, breaking on the thin edge is twice as easy as on the thick (1 1/2") edge. If your question is really how to make your project strong enough, consider how to keep the weight or pressure on the thick edge, not the thin edge. Also, you can have more than one pieces of 1x2! Suppose you are making a ramp and reinforcing the plywood with 1x2 on each underside edge. Screwing the plywood to the 1x2 will hold it such that the 1 1/2 part is being used, and having two pieces might give you the strength you need. Or try three pieces.
That would depend on the specie of wood that the 2x8 is made from.