Question

Looking at the data from both pages, what must be true about the density of
an object in order for it to float?


http://phet.colorado.edu/sims/density-and-buoyancy/density_en.html

Answer 1

In that animation, Styrofoam, wood, and ice float while the rest sink. Their densities are lower than the density of water, which enables them to float. The rest sink because they are denser than liquid water.