The tank holds oil, density 0.8 grams per cubic centimetre, floating on water at 1.0. An object floats on whichever liquid is denser than itself and sinks through whichever is less dense. Set the block's density and predict where it comes to rest. While it floats, the fraction sitting below the surface equals the block's density divided by the liquid's density.
MissionPredict where the block settles, then watch it find its level.Round 1Streak 0Best 0
The block will:
block density0.60 g/cm³
resultfloats on oil
fraction below the surface75%
a body floats when its density is less than the liquid below it.