Does it float?

Six materials are dropped into water. You will make the program list the ones that float, find how much of each is under the surface, and find the density of a liquid in which ice would float only half under. Then it draws the part under the surface as bars.

The idea. An object floats if it is less dense than the liquid. Then the part under the surface is $\dfrac{\rho_\text{object}}{\rho_\text{liquid}}$. An object that sinks is all under.

Your tasks.

1. Inside the loop, add the name to floaters if the object floats.
2. Work out part, the percentage under the surface. A sinker is $100\%$ under.
3. Work out rho_needed, the density of a liquid in which ice floats half under, in $\text{kg/m}^3$.