The Half-Life of ²⁰F Is 11 S

question 68

Multiple Choice

The half-life of ²⁰F is 11 s. What fraction of a sample of ²⁰F will remain after 99 s have elapsed?

• A) 1/10
• B) 1/9
• C) 1/400
• D) 1/512
• E) None of these

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Definitions:

Treasury Bills

Short-term government securities issued at a discount from their face value, with maturities ranging from a few days to 52 weeks.

Volatile

Describes an investment or market that shows frequent and significant price changes over a short period of time.

Nominal Rate of Interest

The rate of interest before adjusting for inflation, reflecting the rate at which money grows over time.

Purchasing Power

A measure of the amount of goods or services that one unit of currency can buy.