Ever wondered why a heavy ship floats, but an iron nail sinks instantly? In this short science explainer, you’ll see a close-up animation of an iron nail sinking in water — revealing how density and buoyancy determine whether objects float or sink. Perfect for students, science lovers, and anyone curious about how everyday physics works! Topics Covered: Why iron sinks in water The role of density and gravity Real-life examples of buoyancy Ideal for: School science projects, quick learning, and fun facts about physics! #ScienceFacts #PhysicsExplained #EducationalShorts