Background Radiation from Cosmic Rays and Radioactive Nuclei in Our

question 27

Multiple Choice

Background radiation from cosmic rays and radioactive nuclei in our surroundings is about 0.13 rem/year. Suppose we assume this all comes from cosmic rays which have an RBE factor of 1.0. The RBE factor for the most dangerous types of radiation is 20. How many rads of the most dangerous radiation could a 100-year-old person have been exposed to in her lifetime without having gone over the recommended limit of 0.5 rem/year?

• A) 0.37
• B) 0.50
• C) 1.85
• D) 13
• E) 37

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Definitions:

End-of-period Spreadsheet

A financial document summarizing a company's financial data at the end of an accounting period, including assets, liabilities, and equity.

Income Statement

The income statement is a financial document that shows a company's revenues, expenses, and net income over a specific period.

Statement of Owner's Equity

A financial statement that outlines the changes in the equity of a company or individual over a specific period, detailing contributions, withdrawals, and the overall profit or loss.

End-of-period Spreadsheet

A tool used in accounting to compile all account balances and adjustments at the end of a period in order to prepare financial statements.