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The British Cave Research Association administers the United Kingdom Cave Conservation Emergency Fund (UKCCEF), a charitable fund for protection of caves and cave features. The aims are: To assist in the publication of material intended to promote the conservation of caves and features therein or the conservation of a specific site or group of ...
In December 2018, Rust Valley Restorers premiered on the History Canadian Channel, [3] and on 23 August 2019 the series was released to Netflix. [8] A second season was ordered and a trailer was released on 22 October 2019 with the season premiering on 21 November 2019. [9] The second season was released to Netflix on 8 May 2020. [10]
Solid oxygen forms at normal atmospheric pressure at a temperature below 54.36 K (−218.79 °C, −361.82 °F). Solid oxygen O 2 , like liquid oxygen , is a clear substance with a light sky-blue color caused by absorption in the red part of the visible light spectrum.
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The air in the cave is very different from the outer atmosphere. The level of oxygen is only a third to half of the concentration found in open air (7–10% O 2 in the cave atmosphere, compared to 21% O 2 in air), and about one hundred times more carbon dioxide (2–3.5% CO 2 in the cave atmosphere, versus 0.04% CO 2 in air).
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In which pO 2 is the chosen maximum partial pressure of oxygen in atmospheres absolute and the FO 2 is the fraction of oxygen in the mixture. For example, if a gas contains 36% oxygen (FO 2 = 0.36) and the limiting maximum pO 2 is chosen at 1.4 atmospheres absolute, the MOD in feet of seawater (fsw) [ Notes 1 ] is 33 fsw/atm x [(1.4 ata / 0.36 ...
Also: spring or resurgence. Cave where water flows out of the entrance used for diving. The flow will generally help divers on the way out. sink See: sink A cave where water flows into the entrance used for diving, which can hinder divers from getting out. sump See: sump A locally low-lying water filled passage of a cave. A cave may have several sumps separated by unflooded or partially ...