What has to be true about mass if a small object (like a metal ball) has a high density?
A: The mass has to be high compared to the volume.
B: The mass has to be low compared to the volume.
C: The mass is not related to the density.
D: The mass would be determined by throwing the ball in water.

Question

What has to be true about mass if a small object (like a metal ball) has a high density? 
A: The mass has to be high compared to the volume.
B: The mass has to be low compared to the volume.
C: The mass is not related to the density.
D: The mass would be determined by throwing the ball in water.

osprey · Answer

A. Density is DEFINED to be the mass of the ball divided by its volume. If something that is small has a high density, then its mass has to be high. Although it would be hard probably for you to test this out, things such as gold, mercury, uranium and other things at the "far end" of the periodic table will probably have higher densities - a small volume of them will "weigh a bit" - compared to elements at the beginning of the periodic table - hydrogen and helium (ok, they're gases, but they still have a density). bon chance et bon voyage http://perendis.webs.com