Search results
Results from the WOW.Com Content Network
The progression is also used entirely with minor chords[i-v-vii-iv (g#, d#, f#, c#)] in the middle section of Chopin's etude op. 10 no. 12. However, using the same chord type (major or minor) on all four chords causes it to feel more like a sequence of descending fourths than a bona fide chord progression.
"Three Chords and the Truth", an oft-quoted phrase coined by Harlan Howard in the 1950s which he used to describe country music; Three Chords and the Truth, a 1997 book by Laurence Leamer about the business and lifestyle of country music and its many stars; Three Chords & the Truth, a radio show hosted by Duff McKagan and Susan Holmes McKagan.
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]
To achieve these aims, WHO has formed a network of key partner agencies from some 40 Member States. This network is the basis for the WHO International Radon Project which was launched in 2005. Working groups will collect and analyse information on radon risk, radon policies, radon mitigation and prevention as well as risk communication.
The ukulele (/ ˌ juː k ə ˈ l eɪ l i / ooh-kə-LAY-lee; from Hawaiian: ʻukulele [ˈʔukuˈlɛlɛ]), also called a uke, is a member of the lute family of instruments of Portuguese origin and popularized in Hawaii. The tone and volume of the instrument vary with size and construction. Ukuleles commonly come in four sizes: soprano, concert ...
Radon is responsible for the majority of public exposure to ionizing radiation. It is often the single largest contributor to an individual's background radiation dose, and is the most variable from location to location. Radon gas from natural sources can accumulate in buildings, especially in confined areas such as attics and basements.
The gamma spectrum shows prominent peaks at 609, 1120, and 1764 keV, belonging to bismuth-214, a radon decay product. The atmospheric background varies greatly with wind direction and meteorological conditions. Radon also can be released from the ground in bursts and then form "radon clouds" capable of traveling tens of kilometers. [7]
Radon concentrations can vary daily, and accurate radon exposure estimates require long-term average radon measurements in the spaces where an individual spends a significant amount of time. [ 173 ] Radon levels fluctuate naturally, due to factors like transient weather conditions, so an initial test might not be an accurate assessment of a ...