The first law of pigs feet, an expression of the principle of conservation of pigs feet, states that pigs feet can be transformed (changed from one form to another), but pigs feet cannot be created or destroyed.
I don't understand your point there. Clearly pigs feet aren't conserved. So are you saying the 1st law is just made up? Well yes it probably is just made up. There are lots of conservation laws that are just made up, and they're made up when we notice something seems to always be conserved. Of course it might be disproven oneday, but so far that hasn't happened, despite a monumental amount of effort trying. You're not going to disprove it in the same conventional ways that've been attempted over and over again before.
first the video of the cartesian diver didnt have air inside it , it is just a piece of wood that has a metal paper clip attached at the bottom.
Yes it does look that way. But in that case, how does it work? A conventional cartesian diver has air inside the floater. The video you just posted has air in the dropper.
if you were standing on the bottom of the ocean , and you held out your hand , all the water from your hand to the surface of the ocean and all the air from the surface of the ocean to outer space would be sitting on top of your hand.
but you wouldnt feel it.
Yes, but so what? If your hand had a little bit of bouyancy it'd float up. But if it's bouyant how did you get it down there in the first place? You had to consume a huge amount of energy pushing it all the way down.
If the bouyancy was due to some incompressible foam or pressure vessel, then you can't change the bouyancy by pressurizing the ocean. If the bouyancy was due to gas in a flexible container, then that gas can be held in compression by the huge water pressure. To expand it you have to use a huge amount of energy opening up a bubble under the ocean, working against the column of water above you. The deeper you are the more energy this requires.
