Imagine ships and boats being made out of a metal that could never be sunk. A material which even with holes all around it had buoyancy, and as such, would always floated back to the surface. First, let's talk about what makes a boat float. In order for a boat, or ship to float above water it has to displace more water than its weight. Meaning that if a boat weighs x, it has to displace water equaling x + 1. Certain vessels use this approach, plus something...