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

question 90

Multiple Choice

The radioactivity due to carbon-14 measured in a piece of a wooden casket from an ancient burial site is found to produce 20 counts per minute from a given sample,whereas the same amount of carbon from a piece of living wood produces 160 counts per minute.The half-life of carbon-14,a beta-minus emitter,is 5730 years.What would we calculate for the age of the artifact,assuming that the activity for living wood has remained constant over time?

• A)5,700 years
• B)11,500 years
• C)14,800 years
• D)17,200 years
• E)23,000 years

Understand the concept of conversion costs and how they are calculated.

Recognize the importance of process costing in industries with repetitive manufacturing processes.

Know how beginning Work in Process and the degree of completion affect equivalent unit calculations.

Understand the treatment of overhead costs in process costing.

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Definitions:

Inner Hair Cells

Sensory cells located in the cochlea of the inner ear, responsible for converting sound vibrations into electrical signals that are sent to the brain.

Axons

Long, slender projections of nerve cells (neurons) that transmit electrical impulses away from the neuron's cell body.

Auditory Route

A pathway in the brain that processes auditory information from the ears to the auditory cortex.

Cochlear Nucleus

An auditory brainstem structure where the cochlear nerve fibers synapse, playing a pivotal role in initial sound processing.