buoyancy
Resources
PhET: Buoyancy
When will objects float, and when will they sink? Learn how buoyancy works and the forces involved by experimenting with objects, like blocks, materials with different shapes, a bottle with substances inside, and blocks in a boat, in a pool with a fluid that can be modified.
PhET: Buoyancy: Basics
When will objects float, and when will they sink? Learn how buoyancy works by experimenting with different blocks, modifying their volume and mass, and placing them in the pool with fluids of different densities. Analyze the forces generated when the block is inside the pool, and identify the variables that affect the buoyant force.
PhET: Balloons & Buoyancy
Experiment with a helium balloon, a hot air balloon, or a rigid sphere filled with different gases. Discover what makes some balloons float and others sink.