The rem is an older radiation dose unit that has been replaced by the sievert.

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Multiple Choice

The rem is an older radiation dose unit that has been replaced by the sievert.

Explanation:
Rem is a historical dose-equivalent unit used to express the potential biological harm from ionizing radiation by incorporating the type of radiation into the dose. It has been replaced by the sievert in modern practice, with the sievert serving as the SI unit for dose equivalent. In conversion terms, 1 sievert equals 100 rem (so 1 rem is 0.01 sievert). This quantity is about biological effect, not about the energy deposited (which is absorbed dose in grays) or about exposure (which is measured in roentgens).

Rem is a historical dose-equivalent unit used to express the potential biological harm from ionizing radiation by incorporating the type of radiation into the dose. It has been replaced by the sievert in modern practice, with the sievert serving as the SI unit for dose equivalent. In conversion terms, 1 sievert equals 100 rem (so 1 rem is 0.01 sievert). This quantity is about biological effect, not about the energy deposited (which is absorbed dose in grays) or about exposure (which is measured in roentgens).

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