Final answer:
The volume of the cube is 1.0 cm³. The new volume reading on the graduated cylinder will be 28.0 mL.
Step-by-step explanation:
The volume of a cube is calculated by multiplying the length of one side by itself twice. In this case, since each side of the cube measures 1.0 cm, the volume is 1.0 cm x 1.0 cm x 1.0 cm = 1.0 cm³.
When the cube is dropped into 28.0 mL of water, the water displacement will be equal to the volume of the cube. Therefore, the new volume reading on the graduated cylinder will be 28.0 mL.