Forbes Lists. Profile. Valparaiso University is a private university in Valparaiso, IN, affiliated with the Lutheran Church. Founded in 1859 by Methodists as one of the nationâs first coeducational colleges, it was bought by the Lutheran University association in 1925.
Rating Newest Oldest. Best Answer: Most rocks have a specific gravity of between 2.5 and 2.9. Therefore a cubic meter of rock would weigh 2,500 to 2,900 kg. Of course there are exceptions, but 90% of the rocks found on the earth's surface would be in that SG range.
Example: Your River rock weight is say 150 lbs per cubic foot. Then one cubic yard weighs: 150 x 27 = 4050 lbs. So there are 4050/2000 tons in a CY of river rock or 2.03 tons.Remember that a Cubic Yard is Volume and a Ton is Weight.One ton of feathers makes more cubic feet than say for instance one ton of silver. So to make this conversion you must know two constants, the weight per CF or CY for that matter and how many cubic feet you have.hen one cubic yard weighs: 150 x 27 = 4050 lbs. So there are 4050/2000 tons in a CY of river rock or 2.03 tons. Remember that a Cubic Yard is Volume and a Ton is Weight. One ton of feathers makes more cubic feet than say for instance one ton of silver.