The Decay Curve Shown Below Approximates the Decay of Cobalt-60

question 55

Multiple Choice

The decay curve shown below approximates the decay of cobalt-60.What is the approximate half-life of cobalt-60?

• A)5 years
• B)12.5 years
• C)15 years
• D)17.5 years

---

Definitions:

Blockage

The obstruction of passage through something, such as a pipe or a blood vessel.

Vital Capacity

Maximum amount of air moved in and out of lungs with forced inhalation and exhalation.

Forced Inhalation

An involuntary or voluntary act of taking air into the lungs through the use of respiratory muscles more forcefully than in normal breathing.

External Intercostal Muscles

Muscles located between the ribs that expand the chest cavity for inhalation by elevating the ribs.