The weight of a cubic foot of rock will depend on the specific gravity and proportion of the minerals that compose the rock.
The answer depends on the density of the rock. A cubic foot of pumice, for example, can have a mass of around 15.6 pounds whereas minerals rich in metals such as iridium will have mass exceeding 1200 pounds.
Basalt (solid)--188 pounds per cubic foot.
1 cubic yard of rock = 27 cubic feet of rock. 27 cubic feet of rock @ 6" (1/2 of foot) = 27/(1/2) = 54 sf
Snow is not uniform for density so you would have to weigh the cubic foot you are interested in. Each pound or kilogram would be composed of 1/9 hydrogen and 8/9 oxygen (by mass) since the molecular weight of water is 18, the atomic weight of hydrogen is 1 and the atomic weight of oxygen is 16. Based on 1 cubic foot of snow being about 10% the weight of a cubic foot of water, it would weigh approximately 6.25 pounds and contain about 5.56 pounds of oxygen.
1 cubic yard is 27 cubic feet, so 3 cubic yards is 81 cubic feet. At 125 lb per cubic foot, that much topsoil would weigh 10,125 lb. At 2000 lb per ton, that converts to 5.0625 tons (if we assume complete precision of all the numbers - if not, then we would be limited to 1 digit of precision because the 3 in 3 cubic yards is only precise to 1 digit. In that case we would have to round the answer off to be 5 tons)
The answer depends on the density of the rock. A cubic foot of pumice, for example, can have a mass of around 15.6 pounds whereas minerals rich in metals such as iridium will have mass exceeding 1200 pounds.
The weight of concrete totally depends on the weight of the rock aggregate that is in it. In my area, the rock is hard basalt, which is a little heavier than some other rock. The weight per cubic foot is around 156 pounds.
80 lbs per cubic foot
The weight of a cubic foot (cf) varies depending on the material. For example, a cubic foot of water weighs about 62.4 pounds. However, a cubic foot of air has a negligible weight.
Nothing by itself. The cubic foot must be full of some kind of matter to have weight. Obviously, a cubic foot of feathers will weigh far, far less than a cubic foot of lead.
For the purpose of calculating joist sizes for Hay Loft, - what is the weight of a cubic foot or cubic metre of baled hay?
The weight of 1 cubic foot of aluminum is approximately 168.5 pounds.
Typical window glass weighs 156 pounds per cubic foot. For comparison, a cubic foot of aluminum weighs about 168 pounds, and a cubic foot of oak is around 50 pounds.
321.112512 kg.
A cubic foot of silver weighs approximately 668.5 pounds (or about 303.5 kilograms). This weight is derived from the density of silver, which is around 10.49 grams per cubic centimeter. Since there are about 28,316.8 cubic centimeters in a cubic foot, the total weight can be calculated accordingly.
Basalt (solid)--188 pounds per cubic foot.
The weight varies depending on the size of the crushed concrete. Large pieces typically have a calculated weight range of 120 to 130 lbs per cubic foot (i.e. rip rap, rubble) while smaller pieces have a calculated weight range of 135 to 145 lbs per cubic foot (i.e roadbase, soil stabilizer). The reason for the difference is that a cubic foot of large aggregate is not as dense and small aggregate because large aggregate does not compact as tightly as the small rock, creating voids between the aggregate.