The Radioactivity Due to Carbon-14 Measured in a Piece of a Wood

question 82

Multiple Choice

The radioactivity due to carbon-14 measured in a piece of a wood from an ancient site was found to produce 20 counts per minute from a given sample,whereas the same amount of carbon from a piece of living wood produced 160 counts per minute.The half-life of carbon-14,a beta emitter,is 5730 y.The age of the artifact is closest to

• A) 5700 y.
• B) 12,000 y.
• C) 15,000 y.
• D) 17,000 y.
• E) 23,000 y.

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Definitions:

Present Value

The value today of the stream of expected future annual income that a property generates.

Interest Rate

Interest paid divided by amount borrowed.

Economic Rent

The excess payment to a resource above what it is necessary to pay to secure its use.

Landlords

Individuals or entities who own property that is rented or leased to others, receiving rental income in return.