A Pure Radioactive Substance Has a Mass of 30 Micrograms

question 142

Multiple Choice

A pure radioactive substance has a mass of 30 micrograms but had a mass of 240 micrograms 48 years ago.Assuming that the only changes in mass are due to radioactive decay, the half-life of the substance is _______ years.

• A) 3
• B) 6
• C) 8
• D) 16
• E) 24

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Definitions:

Money Supply

The entire sum of cash, coins, and account balances in checking and savings that constitute the monetary assets in an economy at a specific time.

Real GDP

The total value of all goods and services produced by a country over a specific time period, adjusted for inflation, reflecting the actual productivity of an economy.

Velocity of Money

The rate at which money is exchanged in an economy, often used to measure the activity level of economic transactions.

Inflation Rate

The inflation rate is the percentage increase in the general level of prices for goods and services in a country over a period of time.