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The frost depth depends on the climatic conditions of an area, the heat transfer properties of the soil and adjacent materials, and on nearby heat sources. For example, snow cover and asphalt insulate the ground and homes can heat the ground (see also heat island). The line varies by latitude, it is deeper closer to the poles.
In astronomy or planetary science, the frost line, also known as the snow line or ice line, is the minimum distance from the central protostar of a solar nebula where the temperature is low enough for volatile compounds such as water, ammonia, methane, carbon dioxide and carbon monoxide to condense into solid grains, which will allow their accretion into planetesimals.
Post-9/11 GI Bill; Other short titles: Post-9/11 Veterans Educational Assistance Act of 2008, Supplemental Appropriations Act of 2008: Long title: An Act making appropriations for military construction, the Department of Veterans Affairs, and related agencies for the fiscal year ending September 30, 2008, and for other purposes
Permafrost temperature profile. Permafrost occupies the middle zone, with the active layer above it, while geothermal activity keeps the lowest layer above freezing. The vertical 0 °C or 32 °F line denotes the average annual temperature that is crucial for the upper and lower limit of the permafrost zone, while the red lines represent seasonal temperature changes and seasonal temperature ...
In geology, the frost line is the level down to which the soil will normally freeze each winter. By an analogy, the term is introduced in other areas. Frost line (astrophysics), a particular distance in the solar nebula from the central protosun where it is cool enough for hydrogen compounds such as water, ammonia, and methane to condense into solid ice grains.
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In July 2008 the Post-9/11 GI Bill was signed into law, creating a new robust education benefits program rivaling the WWII Era GI Bill of Rights. The new Post 9/11 GI Bill, which went into effect on August 1, 2009, provides education benefits for service members who served on active duty for 90 or more days since September 10, 2001.
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