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Qu'est-ce (qui) est K-U ratio - définition
K-U ratio
![upper mantle]] (MORB) and Lower Mantle](https://commons.wikimedia.org/wiki/Special:FilePath/EarthCrustMantleCore.png?width=200 "upper mantle]] (MORB) and Lower Mantle")
RATIO OF A SLIGHTLY VOLATILE ELEMENT, POTASSIUM (K), TO A HIGHLY REFRACTORY ELEMENT, URANIUM (U).
K U ratio; K/U ratio
The K/U Ratio is the ratio of a slightly volatile element, potassium (K), to a highly refractory element, uranium (U). It is a useful way to measure the presence of volatile elements on planetary surfaces.
ratio
![The ratio of width to height of [[standard-definition television]]](https://commons.wikimedia.org/wiki/Special:FilePath/Aspect-ratio-4x3.svg?width=200 "The ratio of width to height of [[standard-definition television]]")
QUOTIENT OF TWO NUMBERS OR QUANTITIES OF THE SAME KIND
Ratios; Ratio analysis; Is to; Mathematical ratio; ∶; ⅌; Ratio sign
(ratios)
A ratio is a relationship between two things when it is expressed in numbers or amounts. For example, if there are ten boys and thirty girls in a room, the ratio of boys to girls is 1:3, or one to three.
The adult to child ratio is 1 to 6.
N-COUNT: usu sing, oft N of n to n
ratio
QUOTIENT OF TWO NUMBERS OR QUANTITIES OF THE SAME KIND
Ratios; Ratio analysis; Is to; Mathematical ratio; ∶; ⅌; Ratio sign
n.
1) a compression ratio
2) an inverse ratio
3) a ratio between
4) at a ratio of; to (at a ratio of three to one)
