A Thallium Source with a Half-Life of 3

question 72

Multiple Choice

A thallium source with a half-life of 3.7 years was certified at 10 kBq ten years ago.What is its activity now?

• A)4.7 kBq
• B)3.3 kBq
• C)1.5 kBq
• D)1.0 kBq

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Definitions:

Transduction

The process by which a cell converts a signal or stimulus from one form to another, commonly used in reference to sensory information or genetic engineering.

Sensory Adaptation

A process in which sensory receptors progressively lose sensitivity to constant external stimuli over time.

Novel Stimuli

New or unfamiliar stimuli that can attract attention and provoke responses not conditioned by previous experience.

Visible Light

The portion of the electromagnetic spectrum that is visible to the human eye, responsible for the sense of sight.