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

question 59

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:

Serous Membrane

A thin layer of tissue that lines certain internal cavities of the body, secreting a fluid that lubricates organ surfaces.

Inflammation

A biological response to injury or infection, leading to redness, heat, swelling, and pain in the affected area.

Lung

One of the two respiratory organs located in the chest, which facilitate the exchange of oxygen and carbon dioxide between the air and blood.

Organisms

Living entities that can carry out life processes independently, ranging from bacteria to plants and animals.