What Is a Half-Life

question 89

Multiple Choice

What is a half-life?

• A)It is the time it takes for 1/2 of the material to undergo radiodecay.
• B)It is the time needed until 1/2 of the radiation is gone.
• C)It is the time it takes for 1/2 of the material to decompose.
• D)It is half of the lifetime of the radioactivity in a sample.
• E)all of the above

---

Definitions:

Power-Driven Machinery

Machines that operate using an external source of power, such as electricity, steam, or fuel, allowing for more efficient production processes in various industries.

Factory Town

A settlement where the main source of employment and community life centers around manufacturing plants or factories.

Voluntary Manumission

The act of a slave owner freeing their slaves of their own volition, without external compulsion, a practice that varied in its frequency and conditions throughout history.

Plantation Crop

A type of crop specifically grown on a large estate or plantation, primarily for sale and not for local consumption, typically including commodities like tobacco, cotton, sugar, and tea.