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:

Acrophobia

The intense fear of heights, which can significantly impact an individual's ability to climb ladders, ride in tall buildings, or even stand on a chair.

Necrophobia

An extreme or irrational fear of death or dead bodies.

Claustrophobia

An anxiety disorder characterized by an intense fear of being in confined or enclosed spaces.

Social Anxiety Disorder

An irrational, excessive fear of public scrutiny.