The energy that comes from nuclear fusion on the Sun produces most of the energy on Earth. The solar energy that is impacting Earth can be used to generate electricity and heat. Electricity is either converted by solar cells (called photovoltaic) or through solar power plants.
General Weights. Solid rock is estimated at 2.5 to 3tons per cubic meter. If rock is crushed into uniform sizes, the presence of open space between the particles causes the load to be lighter -- approximately 1.6 tons per cubic meter.ixed sizes of crushed rock can range from 1.6 to 2.2 tons per cubic meter. Weighing in at .92 tons are masonry sand, building sand, and stone chips or flakes. These are some of the lightest materials. The next level, at just under one ton, are concrete sand and airfield sand.
Then multiply by volume of stone needed by the density of the stone â which is 100 pounds per cubic foot. 140.25 feet3 x 100 pounds / foot3 = 14,025 pounds. You can see that we will need about 14,025 pounds of stone or a little over 7 tons.ixed tumbled stones weigh about 0.0618 pounds per cubic inch (or about 107 pounds per cubic foot), and we need 162 cubic inches, so we simply multiplyâ¦. 162 inches3 x 0.0619 pounds/inch3 = 10.01 pounds. Thereâs our answer. We need about 10 pounds of mixed tumbled stones for each planter.