Roentgen (unit) absorbed dose in a wide range of matter. When measuring absorbed dose in a human due to external exposure, the SI unit the gray, or the related non-SI rad are used. From these can be developed the dose equivalents to consider biological effects from differing radiation types and target materials. These are equivalent dose, and effective dose for which the SI unit sievert or the non-SI rem are used. The following table shows radiation quantities in SI and non-SI units: Roentgen (unit) The roentgen or röntgen () (symbol R) is a legacy unit of measurement for the exposure of X-rays
The Amazing Race (Latin America) no news since of any further seasons. Mexico is also the runner-up in this season.<br> As of the sixth season, the Latin American version of The Amazing Race has visited 15 countries and has visited only the Americas (except Canada and the United States). The Amazing Race (Latin America) The Amazing Race, formerly known as The Amazing Race en Discovery Channel (), is a reality game show based on the American series of the same name, "The Amazing Race". On 15 October 2008, a Latin American version of the show was announced by Discovery Channel Latin America in association with