A Radioactive Source Decays from 20 MCi to 2

question 15

Multiple Choice

A radioactive source decays from 20 mCi to 2.5 mCi in 18 hours.What is the physical half-life?

• A)8 hours
• B)7 hours
• C)6 hours
• D)5 hours

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Definitions:

Trading Posts

were locations established primarily for the purpose of trading goods between traders and local populations, significant during the era of exploration and colonial expansion.

Zuni

A Native American tribe primarily located in New Mexico, known for their unique cultural practices, religious beliefs, and handmade jewelry.

Hopi

A Native American tribe primarily residing in northeastern Arizona, recognized for their rich cultural traditions, cliff dwellings, and skilled artistry, particularly in pottery and weaving.

Irrigation

The artificial application of water to land to assist in the production of crops.