Calculate the fraction of an iceberg’s total thickness that is above the surface of the ocean. Assume the densities of ocean water and of ice are 1003 and 917 kg/m³, respectively. Please show a diagram of the situation, and be neat about the balance you set up.

Now observe an ice cube in a glass of water as it melts, and plot both the root and the freeboard as functions of time. Now plot their ratio as a function of time.