Two identical parts are made of copper and brass. To find out which one was made of brass

Two identical parts are made of copper and brass. To find out which one was made of brass, they were placed on a scale. Which detail outweighs?

Under normal conditions, the density of copper is 8.92 g per cubic meter. cm, and brass – 8.5-8.7 g per cubic meter. cm, i.e. copper is slightly heavier. Since we are talking about the same parts, their volumes are the same, and the difference in masses is due to the difference in the density of materials. Therefore, since copper is heavier (it has a higher density per unit volume), then the part made from it will outweigh the brass one.