Thats Insane

What would happen if you took a glass of water, put an index card over top of it, turned it upside down, and took your hand off of the index card? You’d expect the card to fall off and water to go everywhere, right? Well, that’s not what actually happens. The card stays put (at least until it becomes too wet to hold its shape) and you remain dry. At least until you remove the card. I’m not a magician, so I can’t actually pull off a literal anti-gravity water trick. But it’s not actually defying gravity (although, technically speaking, the action of lifting the glass is “defying gravity“ because in literal terms it means when any kind of force acts against and overcomes gravity, therefore every time you use a magnet, you’re defying gravity via magnetism). What happens is that the air pressure of the Earth, 14.7 pounds, pushes up against the water in the glass and the index card, aided by suction holding the card in place and the surface tension of the water, and it’s enough to keep the water in place until the