NURSING EXAM QUESTIONS
MICROBIOLOGY
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Becquerel and curie
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Kcal and cal
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Kpascal and pascal
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None of the above
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Detailed explanation-1: -The original unit for measuring the amount of radioactivity was the curie (Ci)–first defined to correspond to one gram of radium-226 and more recently defined as: 1 curie = 3.7x1010 radioactive decays per second [exactly]. 1 becquerel = 1 radioactive decay per second = 2.703x10-11 Ci.
Detailed explanation-2: -A material’s radioactivity is measured in becquerels (Bq, international unit) and curies (Ci, U.S. unit). Because a curie is a large unit, radioactivity results are usually shown in picocuries (pCi). A picocurie is one trillionth of a curie. The higher the number, the more radiation released by the material.
Detailed explanation-3: -The becquerel (symbol: Bq) is the SI unit of radioactivity and is defined as one nuclear disintegration per second 1; it officially replaced the curie (Ci), the unit in the superseded cgs system, in 1975.
Detailed explanation-4: -The curie (symbol Ci) is a non-SI unit of radioactivity originally defined in 1910.