Sure copper is heavier then iron in density But still 100 Lbs vs 2000 Lbs where I come from 16 Ounces makes a Pound it Dosn't matter what the Material.

and this theory of what weighs more a Pound of Rocks or a Pound of Feathers now that there is Funny Again where I come from a Pound is 16 Ounces. {They are Both the Same A Pound} now the Volume Is Different but the Pound dont change. Yeah you can argue that there is a difference in a Long ton Vs a Short ton But there is still only 16 Ounces in a Pound.

Just saying