Anywho, if you want to make a vessel or container that resists as much pressure (compression force) as possible, the walls of the vessel must distribute that force as evenly as possible.
That means the absolute strongest vessel to resist pressure and hold its shape would be a perfect sphere. Cylinders are second best, but really only if the ends are capped with a hemisphere. Which is why submarines look like they do.
As for the wine bottles, the Titanic didn’t just drop 2.5 miles down to the bottom of the ocean in an instant. If it had, the bottles probably would have failed first along the seam of the flat end. But because of what was described above and the slower descent of the ship to the bottom (giving the process time to work), the pressure had time to equalize.
If you take a solid steel sphere and drop it to the bottom of an extra deep Mariana trench that’s at 40,000 PSI nothing will happen to the sphere. It’ll compress a little bit. At some point you’ll compress it enough to get a phase change but it’s not going to break with uniform force from every direction.
My daughter is volunteering at a charity car wash today. Bunch of high schoolers. She said some 30-something year-old guy drove up when she and her friend were holding a sign on the street and said they’d get a lot more customers if they were topless.
When a submarine hull collapses, it moves inward at about 1,500mph (2,414km/h) - that’s 2,200ft (671m) per second, says Dave Corley, a former US nuclear submarine officer.
The time required for complete collapse is about one millisecond, or one thousandth of a second.
A human brain responds instinctually to a stimulus at about 25 milliseconds, Mr Corley says. Human rational response - from sensing to acting - is believed to be at best 150 milliseconds.
The air inside a sub has a fairly high concentration of hydrocarbon vapours.
When the hull collapses, the air auto-ignites and an explosion follows the initial rapid implosion, Mr Corley says.
Human bodies incinerate and are turned to ash and dust instantly.
