The standard international unit for quantifying radioactivity is_____________?
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Answer: C. curie
Explanation
The curie is a historical unit established to quantify the rate of radioactive material decay. It is defined precisely as thirty-seven billion nuclear disintegrations occurring per second. This standard unit provides a common benchmark for measuring radioactivity levels in sources. The unit was originally named in honor of pioneers Pierre and Marie Curie and their research. Modern international systems use the becquerel, where one becquerel equals one decay per second. One curie equals thirty-seven gigabecquerels in equivalent international radioactivity units.
Industrial radiography and nuclear medicine facilities use curies to specify radiation source strengths. Handling radioactive materials safely requires accurate measurement of decay activity levels. Regulatory agencies enforce strict safety limits based on activity quantities measured in standard units. Electron-volt measures fundamental particle kinetic energy rather than nuclear decay radioactivity rates. Electron-ampere is not a standard scientific unit used in nuclear physics or radiation measurement. Mega-electron-volt measures particle energy levels rather than the macroscopic activity of radioactive sources.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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