Physics
Buoyancy
Archimedes in a 3D pool: density decides - float, sink or hover - with caustics on the bed.
What happens
Archimedes in a live 3D pool: each body sinks until the water it pushes aside weighs as much as itself, so density alone decides who floats, who hovers and who goes down. Watch the bobbing settle on real waves, splash the surface with a click, and thin the fluid until even the light bodies drown.
Try this
Archimedes: the submerged fraction is the density ratio, so half means a fluid of 1.50. Watch the block settle to the new level.
Equations used in the module
Equations F_A = ρ_f g V_sub ρ_b V = ρ_f V_sub V_sub/V = ρ_b/ρ_f
