Under water turbans that are placed at the above to middle of the ocean they are used to capture kinetic motion
The density of the material would be
25/6 grams per cm^3.
to obtain the result above this is what we do:
density is calculated as: (the mass of the given material or object) / volume of the material
which leads us to 50grams /12cm^3
The kinetic energy is

and the height of the building doesn't matter at all.

joules