How Many Days Are Required for a Radioactive Sample,with a Half-Life

question 80

Multiple Choice

How many days are required for a radioactive sample,with a half-life of 5.7 d and an initial activity of 1.07 × 10⁵ Bq,to decay to an activity of 100 Bq?

• A) 57 d
• B) 46 d
• C) 68 d
• D) 39 d

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Definitions:

Required Emotions

The emotions that individuals are expected to display in certain professional roles or social situations, regardless of their actual feelings, often as part of their job performance.

Cognitive Dissonance

A psychological discomfort experienced when holding contradictory beliefs or ideas, prompting an individual to seek consistency.

Attitudes

The settled ways of thinking or feeling about someone or something, typically reflected in a person's behavior.

Behavior

The actions or reactions of an individual or group in response to external or internal stimuli.