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Specific gravity is often defined relative to water, in which case the specific gravity of air is 0.001225. Specific gravity can also be defined relative to the density of air, in which case the specific gravity of air is exactly 1. Specific gravity is often defined relative to water, in which case the specific gravity of air is 0.001225. Specific gravity can also be defined relative to the density of air, in which case the specific gravity of air is exactly 1.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoThe specific gravity of air is 1 by definition. The specific gravity of any gas is typically defined as its density ratio compared to an equal volume of dry air. The specific gravity of substances other than gasses is defined using distilled water as a reference of value 1.
This convention of using air as a reference for gasses was adopted because of the orders of magnitude of difference between the densities of gases versus most other substances. Using air as a reference allows relative density calculations of gases to be performed with few decimal places.
This can lead to some confusion when trying to compare the relative densities of a gas to a non-gas, since the specific gravities of each are based on different reference values. At sea level and at 60 degrees F, water is 784 times more dense than air. To convert water-based specific gravity values to air-based values (for comparison of the specific gravity of a liquid to a gas, for example), multiply the stated specific gravity by 784. Do the inverse to compare a gas to a liquid or solid.
Wiki User
∙ 12y agosg is a density comparison , water bieng 1 (density 1000 kg/m^3)
say iron at 8000 kg/m^3 , sg = 8000/1000 = 8 (eight times density of water)
say air at 1.25 kg /m^3 , sg = 1.25/1000 = 0.00125
Wiki User
∙ 11y agoAt 20 °C , dry air has a density of 1.2041 kg/m3, and water has a density of 998.2071 kg/m3. (Wikipedia)
Specific gravity of air = density of air/density of water =
(1.2041 kg/m3)/(998.2071kg/m3) = 0.0012063
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What is the difference between apparent specific gravity and absolute specific gravity and bulk specific gravity?
Dry Bulk Specific Gravity does not take into account for anything getting into the permeable or impermeable voids of say a stone by water for instance. Saturated Surface Dry Bulk Specific Gravity takes into account for anything getting into the permeable voids only of say a stone by water. Apparent Specific gravity takes into account for the volume of the impermeable voids and not anything getting into the permeable voids of say a stone by water.
What is the Specific gravity of acetone?
specific gravity of acetone is 0.79
The specific gravity of a product?
The specific gravity of a product can be found on the material
What is specific gravity of feldspar?
The specific gravity of a substance is the ration of its density to some standard, almost always water for liquids or solids. In this case, Feldspar has a specific gravity of about 2.6.
How does air effect gravity?
Air has no effect on gravity. But the presence of air can change the response of an object to the force of gravity alone.
Specific gravity of natural gas?
specific gravity for common natural gas : 0.55 to 0.7 Specific gravity is unitless and is give the density of the gas divided by the density of air at 20C and 1bar.
How much is the specific gravity of concrete?
That may be strength specific and will be subject to air entrainment
Which gases weigh less than air?
Appended is a list of gases with their specific gravities. The specific gravity of a gas is a comparison of its density with that of air at the same temperature and pressure. Gases with a Specific Gravity (SG) less than1 are lighter than air.
What is the meaning of zero air void?
no air void in it and plots against specific gravity
How can you calculat the specific gravity of air?
You could measure the weight of a recipient with air, and compare it to one without air (with a vacuum instead).
What is diamonds specific gravity?
The specific gravity of diamond is 3.5, which is 'above average'.
What is the difference between apparent specific gravity and absolute specific gravity and bulk specific gravity?
Dry Bulk Specific Gravity does not take into account for anything getting into the permeable or impermeable voids of say a stone by water for instance. Saturated Surface Dry Bulk Specific Gravity takes into account for anything getting into the permeable voids only of say a stone by water. Apparent Specific gravity takes into account for the volume of the impermeable voids and not anything getting into the permeable voids of say a stone by water.
Is any relation between cement density Specific Gravity?
specific gravity of any substance can be find out only when it will be in liquid or gas medium.Because specific gravity of any liquid equals to ratio of density of that liquid to the density of water and specific gravity of any gas is the ratio of density of that gas to the density of air. cement is solid material(powder form) and so can not be graded on the basis of specific gravity in all conditions. (ravi nitesh,KPTL)
What is the specific gravity of magnetite?
There is no such thing as a specific gravity for any element.
What is specific gravitiy?
Specific gravity is the ratio of a substance's density to the density of a reference substance, usually water for liquids, or air for gas. For example, since the density of iron is about 8 times as much as that of water, that means that its specific gravity is 8.
What is the specific gravity for aluminum?
Aluminum has no specific gravity, at least by the current definition of gravity.
Can you calculate specific gravity without a hydrometer?
Specific gravity is a measure of density in comparison to the density of water (or air). A hydrometer is used for liquids but is not the only means. If you have a scale which can measure down to milligrams accurately, then by weighing one ml of the liquid you are checking will give you the specific gravity. specific gravity of water = 1 example: 1 milliliter of beer weighs in at 987 milligrams then the specific gravity is .987 . .987 g/ml / 1 g/ml = .987 (SpG)
