Introduction Have you ever wondered why when you drop a steel nail into water it sinks like a stone, but when a well-built steel ship is in the ocean it floats, even though it weighs much more than a ...

How much water do you need to keep a cruise ship afloat? Less than you’d think. Archimedes’ Paradox lets you float a huge object in just a gallon or two of water. (It also shows why you’d need a ...