Question

The density of copper is 8.94 g/cm3

at 20 and 8.91 g/cm3 at 60 . This density decrease is

the result of

Answer 1

The decrease in density of copper is the result of increase in volume from 20 to 60 while the mass remains constant. The density is the ratio between mass and volume and therefore when the volume increases and the mass remains constant, the density will decrease.