Question

You have two cubes. They are the same size. They are both painted

white. One is iron, the other copper. What is the best way to determine
which is which?

Answer 1

Answer: The best way to determine which is which should be to figure out which cube is heavier.

Explanation: Copper is more dense than Iron so the cube that is heavier (or more massive) should be Copper, and the lighter cube, Iron.

Answer 2

You can determine which is which by weighting them

Copper usually weighs heavier than iron, so if you weigh them both on the scale, the heavier one would be the copper cube

Hope this helped!