The shape of an object is not enough to calculate its density. You also need its mass and then
Density = Mass/Volume.
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The density of an object is its mass divided by its volume. Without the volume, you cannot calculate its density.
If the cube is uniform ( ie it has uniform density) then the geometric center of the cube is its center of gravity.
-- Use the length of the cube's side to calculate its volume. -- Divide the cube's mass by its volume. The quotient is its density. The density is 6.25 g/cm3 . Now that you know the answer, you can fill in the missing steps, and learn something at the same time. Is that cool or what !
You would need a balance to measure its mass. You would need a ruler to measure the length of its sides. Then you would need to calculate volume. Then divide the mass by the volume to get density.
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