A Rock Sample from the Moon Includes a Mineral That

question 31

Multiple Choice

A rock sample from the moon includes a mineral that contains small amounts of the radioactive isotope Potassium- 40 and its daughter element Argon- 40 (half- life of 1.3 billion years) . This mineral would not form with any Argon- 40. Consider a crystal with 7 atoms of Argon- 40 for every 1 atom of Potassium- 40. How long ago did this crystal form?

• A)13.5 billion years ago
• B)1)3 billion years ago
• C)3)9 billion years ago
• D)5)2 billion years ago

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Definitions:

Net Working Capital

The difference between a company’s current assets and current liabilities, indicating short-term financial health and operational efficiency.

Capital Intensity Ratio

A measure of how much capital is used in comparison to labor in the production process of a company.

Operating Capacity

The maximum output a company can produce using its current resources and assets under normal working conditions.

Total Assets

The sum of all current and long-term assets owned by a company, representing its total resources or what it owns.