Radioactive Decay: a Radioactive Sample Has a Half-Life of 10

question 59

Multiple Choice

Radioactive decay: A radioactive sample has a half-life of 10 min. What fraction of the sample is left after 40 min?

• A) 1/2
• B) 1/4
• C) 1/8
• D) 1/16
• E) 1/32

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Definitions:

Unconscious Perception

The process by which individuals can respond to stimuli without being consciously aware of those stimuli.

Spatial Neglect

A neuropsychological condition typically resulting from a brain injury, where an individual fails to attend to or process stimuli on one side of the body or space.

Scowling Face

A facial expression often used to convey displeasure, anger, or disapproval, characterized by a furrowed brow and frowned mouth.

Face Muscles

A group of striated skeletal muscles situated underneath the facial skin that controls facial expression, enabling humans to communicate feelings and emotions non-verbally.