An Air Sample Is Contaminated with ¹⁵O,which Has a Half-Life

question 15

Multiple Choice

An air sample is contaminated with ¹⁵O,which has a half-life of 2.03 minutes.You can pass it through a long pipe to allow it to decay until it can be safely released,at an air speed of 1.1 m/s.How long must your pipeline be for the sample to decay to 3% of its original activity?

• A)678 m
• B)8 m
• C)7 m
• D)2 m

---

Definitions:

Abnormal

Deviating from what is considered normal or typical, often referring to behaviors, conditions, or phenomena that fall outside societal norms or average patterns.

Paraphrasing Skills

The ability to restate the text or speech in one's own words while maintaining the original meaning.

Misunderstandings

Situations in which the meaning, intention, or effect of communication is not correctly perceived or interpreted by one or more parties.

Listening

Process of selecting, attending to, creating meaning from, remembering, and responding to verbal and nonverbal messages.