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.
Re: cubic feet in a ton of coal. Originally posted by clinker. Rock (like granite) weighs about 185 lb per cubic foot. Water weighs 62.4 lbs per cubic foot. coal that weighs less than 62.4 lbs per cubic foot would float on water (and I've never seen coal that floats unless it is close to being lignite or peat).