To determine whether the density of the Custom Cube is greater than, less than, or equal to the density of the water based on its behavior, you can use the following general principles:
- If the Custom Cube floats on the water, its density is less than the density of the water.
- If the Custom Cube sinks or does not come to rest at the water's surface, its density is greater than the density of the water.
- If it is suspended, its density is equal to the density of the water.
Since you mentioned that the Custom Cube does not come to rest at the surface of the water, this indicates that its density is greater than that of the water.
Therefore, the best answer is:
The density of the Custom Cube.