In a Laboratory Accident a Work Area Is Contaminated with Radioactive

question 10

Multiple Choice

In a laboratory accident a work area is contaminated with radioactive material.Health physicists monitor the area during a 30-day period and,after correcting for the background rate,obtain the data shown in the table. The accident occurred at t = 0.They determine that it will not be safe for workers to enter the area until the radioactivity level has dropped to 133 counts per minute.Of the choices listed below,which one is the earliest time that workers could safely return?

• A)38 days
• B)44 days
• C)50 days
• D)32 days
• E)24 days

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Definitions:

Double Helix

The structure of DNA, characterized by two twisted strands forming a shape similar to a spiral staircase.

Stage Theorists

Researchers or psychologists who propose that development occurs in distinct, sequential phases or stages.

Sigmund Freud

Austrian neurologist and the founding father of psychoanalysis, a method for treating psychopathology through dialogue between a patient and a psychoanalyst.

Jean Piaget

A Swiss psychologist known for his pioneering work in child development, particularly his theory of cognitive development stages.