gardner wrote:How many cubic yards equals a ton? How many tons is 2000 cubic yards?
Depends on the substance. For example, one ton of water equals to 1.187 cubic yards. But one ton of iron would be much more compact.
To convert between mass/weight and volume you need to know the density of the substance. A good table of densities can be found on this site:
http://www.simetric.co.uk/si_materials.htm