The first is a kind of warm-up question, dealing with general buoyancy principles. The other two are puzzlers, meant to exercise your mind. Don't fret if you find these too challenging ...

Archimedes discovered the principle of buoyancy from a spark of ordinary life while watching water flowing out of the bathtub. Descartes saw a fly crawling on the ceiling and came up with the ...

Buoyancy is derived from carriers being less ... requiring more and more force to continue doing so. This principle means the ...