A Certain Radioactive Isotope Placed near a Geiger Counter Registers

question 98

Multiple Choice

A certain radioactive isotope placed near a Geiger counter registers 120 counts per minute. If the half life of the isotope is one day, what will the count rate be at the end of four days?

• A) 5 counts/min
• B) 30 counts/min
• C) 10 counts/min
• D) 7.5 counts/min
• E) 15 counts/min

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Definitions:

Distended Veins

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Capillary Filling Time

A clinical test used to assess blood circulation by applying pressure to the skin to create blanching and then observing the time it takes for color to return.

Pallor

An unhealthy pale appearance typically indicating anemia or lack of blood supply.

Clubbing

A condition characterized by bulbous enlargement of the ends of one or more fingers or toes, usually associated with chronic oxygen deficiency or various diseases.