Never. The specific gravity of a substance is its density compared to water.
If that happens to be 2.509, then any amount of the substance weighs
2.509 times as much as an equal amount of water. One cubic foot of water
weighs about 62.4 pounds, so one cubic foot of the substance you've described
weighs about 156.6 pounds.
"50 pounds per cubic foot" means that the specific gravity is about 0.80 .
Volume = 10 ft3 (given) Density = 0.4 pounds per ft3 Specific gravity = about 0.0064 (using 62.5 pounds per ft3 for water)
The density of a compound with a specific gravity of 1.08 is 1.08 g / cubic centimeter
10
Sodium Bicarbonate, NaHCO3: Specific Gravity 0.97 Thus, 60.555 122 016 pound/cubic foot
0.9168, or 916.8 kg/m3
It depends on 10mm what, and the density (or specific gravity) of whatever that substance is.
(specific gravity = density relative to water), water is 1 g / cubic centimetre, aluminium is 2.7 g / cubic centimetre, so s.g. is 2.7/1 = 2.7
Your question is unclear. However specific gravity is another term for density. Density is the mass of a substance in a unit of volume. Kilograms per cubic metre for instance
specific gravity = relative density (relative to water @ 1 g / cubic centimetre) specific gravity of gold is 19.3, so is 19.3 times the density of water. so gold is 19.3 g / cubic centimetre volume of 6k (6 000 g) of gold is : 6 000 / 19.3 = 310.9 cubic centimetres (.3109 litres)
the specific gravity of galena is 7.4-7.6, so the average is 7.5
Steel has a Specific Gravity of 7.83. This means that a cubic foot of steel weighs 7.83 times more than a cubic foot of water (which weighs 62.4 pounds)
Specific gravity and density will have the same value when the two substances under investigation have identical densities. Let's look at this. Density is an expression of the amount of mass per unit of volume that a substance exhibits. Liquid water has a maximum density at about 4 °C. And there is 1 gram in a cubic centimeter or a milliliter of water. We say water has a density of 1 gram/cubic centimeter. Other substances can have their mass discovered when a known volume is weighed, and then the density of those substances can be discovered and recorded. Specific gravity is a comparison of the density of a substance to the density of water. The specific gravity of a material will not have units associated with it. It is a purenumber. If a substance has a spee gee (lab speak for specific gravity) of 2, it will have 2 times the density of water. A cubic centimeter of this material will weigh 2grams, and will have a density of 2 grams per cubic centimeter. But, to repeat, spee gee has no units associated with it. The only time that specific gravity and density will have the same value is when the substance under inspection has the same density of water at 4 °C. That's the only time density and spee gee will have the same value. And note that we're talking value here, and without regard to units. Density has units of mass per unit of volume, and specific gravity has only a numerical value, only magnitude, and nounits associated with it.