Endert
ok this is just a place to pose the question how much pressure an object can take. I would like to ask the first one.
How much pressure can a glass bottle take before exploding?
Depends how you wanna crush it. It will take less pressure to break the bottle if you apply it as the bottle is laying on its side, than if you applied it as the bottle was standing up. To calculate exactly the breaking pressure point of a plastic bottle of water, you need it's thickness, and it's dimensions. You also need to know if it's a perfect cylinder, cause then the calculations are easier. Also if the bottle isn't a perfect cylinder, and has grooves, then it shall break more easily, along the grooves. IF we assume that the bottle shall be broken from the side, then we can use the simple equation
sigma = PD/4t
where D = diameter, P = pressure, sigma = stress, t = thickness
if we kow the ultimate stress of the water bottle material, plastic (which can be looked up in tables, or found experimentally) and the dimensions of the bottle, we can easily figure out the pressure needed to break the bottle. But you need sigma, and I don't have it for plastic in my table, so you can probably find it on the internet. Then just plug it in the equations and there you go.