The Galaxy Has Become Enriched in Heavy Elements Since It

question 56

Multiple Choice

The galaxy has become enriched in heavy elements since it formed.What is responsible for the enrichment?

• A)Nuclear reactions in interstellar clouds
• B)The infall of heavy elements from intergalactic space
• C)The transformation of cosmic rays into heavy elements
• D)Nuclear reactions in stars,followed by stellar mass loss

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Definitions:

Interest Rate

The percentage of a sum of money charged for its use, often expressed as an annual percentage on loans or earned on savings.

Net Present Value

A financial metric that calculates the present value of all future cash flows associated with a project, minus the initial investment cost.

Interest Rate

The percentage charged on a loan or paid on savings, representing the cost of borrowing or the reward for saving.

Present Value

The present value of an anticipated amount of money or series of payments, considering a certain rate of return.