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For levels of 20 picocuries radon per liter of air (800 Bq/m 3) or higher, the home owner should consider some type of procedure to decrease indoor radon levels. [1] For instance, as radon has a half-life of four days, opening the windows once a day can cut the mean radon concentration to one fourth of its level.
The three classrooms had levels ranging from 1.9 pCi/L to 5.6 pCi/L, according to the school district. No elevated levels were found in the gymnasium basement or other areas tested.
1 ~0.027 Radon concentration at the shores of large oceans is typically 1 Bq/m 3. Radon trace concentration above oceans or in Antarctica can be lower than 0.1 Bq/m 3, [101] with changes in radon levels being used to track foreign pollutants. [102] 10: 0.27 Mean continental concentration in the open air: 10 to 30 Bq/m 3.
In a working mine, the radon level can be controlled by ventilation, sealing off old workings and controlling the water in the mine. The level in a mine can go up when a mine is abandoned; it can reach a level which can cause the skin to become red (a mild radiation burn). The radon levels in some of the mines can reach 400 to 700 kBq m −3. [17]
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Someone Behind You: Oh-Ki Hwan: A young female student is stalked by a lethal curse, causing her family and friends to attempt to kill her. Released in the US in 2009, retitled as Voices: 2009 Jennifer's Body: Karyn Kusama: A high school girl must stop her demonically possessed friend from killing her male classmates. [91] 2013 Carrie: Kimberly ...
Rec (stylized as [•REC]; short for "record") is a 2007 Spanish found footage zombie film co-written and directed by Jaume Balagueró and Paco Plaza.The film stars Manuela Velasco as a reporter who, with her cameraman, accompany a group of firefighters on an emergency call to an apartment building to discover an infection spreading inside, with the building being sealed up and all occupants ...
The man who visited her at the hospital is actually a lawyer who was fatally stabbed by a school teacher with the teacher saying "a soul for a soul" as he stabbed the lawyer, while a child who spooks Katrina actually went missing back in 2010. After an aborted attempt to kill a dying old man in the hospital, Katrina sets her sights on Billy, an ...