The Activity of a Sample Reduces from 7 $10 ^ { 9 }$

question 79

Short Answer

The activity of a sample reduces from 7.55 × $10 ^ { 9 }$ Bq to 5.11 × $10 ^ { 9 }$ Bq in 5.50 months.
(a)What is its half life?
(b)How many months from the start must one wait for the activity to decrease to 10% of its original value?

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Definitions:

Animals

Multicellular, eukaryotic organisms in the kingdom Animalia that are characterized by their ability to move, reproduce sexually, and consume organic material.

Sleep

A natural, periodic state of rest for the mind and body, characterized by altered consciousness and reduced responsiveness to external stimuli.

Hours

Units of time equivalent to 60 minutes, used to measure the duration of events or the intervals between them.

Brain Activity

Brain activity involves the various neurological processes and actions carried out by the brain, including cognitive functions, emotions, and controlling bodily functions.