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.
The average weight of a sandstone boulder is approximately 150 pounds per cubic foot. Limestone boulders and granite boulders in most cases weigh more. They average about 175 pounds per cubic foot. To estimate the quantity, you need to convert the area into cubic feet by multiplying length x width x height.