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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
∙ 12y 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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How do you calculate weight using specific gravity?
To calculate weight using specific gravity, you multiply the specific gravity of the substance by the weight of the substance in air. This gives you the weight of the substance in a vacuum.
Is air pressure a result of gravity?
Yes, air pressure is a result of gravity. The weight of the air molecules above a specific area creates pressure at that point. Gravity pulls the air molecules towards the Earth's surface, causing them to be compressed and create pressure.
What is the Specific gravity of acetone?
The specific gravity of acetone is approximately 0.79 at 20°C.
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 specific gravity of feldspar?
The specific gravity of feldspar can vary depending on the type and composition of the feldspar mineral. On average, feldspar minerals have a specific gravity ranging from about 2.5 to 2.8.
What is heliums specific gravity?
Helium's specific gravity is approximately 0.138 when compared to air at standard temperature and pressure. This means that helium is much lighter than air and tends to rise.
How do you calculate weight using specific gravity?
To calculate weight using specific gravity, you multiply the specific gravity of the substance by the weight of the substance in air. This gives you the weight of the substance in a vacuum.
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.
How much is the specific gravity of concrete?
That may be strength specific and will be subject to air entrainment
Specific gravity of natural gas?
The specific gravity of natural gas typically ranges from 0.55 to 0.70. This means that natural gas is lighter than air, which is why it tends to rise and disperse into the atmosphere if released. Specific gravity is a measure of density compared to water, with water having a specific gravity of 1.
Specific gravity of hydrogen?
The specific gravity of hydrogen is approximately 0.07. This means that hydrogen is much lighter than air and will rise rapidly. It is the lightest element on the periodic table.
Is air pressure a result of gravity?
Yes, air pressure is a result of gravity. The weight of the air molecules above a specific area creates pressure at that point. Gravity pulls the air molecules towards the Earth's surface, causing them to be compressed and create pressure.
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).
Propane specific gravity?
The specific gravity of propane is 0.495 at 25oC.
What has the highest specific gravity Styrofoam Water halite gold?
Gold has the highest specific gravity out of the options given, as it is a dense metal. Styrofoam has a low specific gravity because it is lightweight and mostly made up of air. Water has a specific gravity of 1, while halite (rock salt) is more dense than water but less dense than gold.
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.
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)
